Standards Progression for Fractions by Jimmy DuVal

3.NF.1

duvalj76 — 2021-04-18 17:50:04 UTC

Understand a fraction 1/b as the quantity formed by 1 part is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of 1/b
- The number 2 may be partitioned into 2 equal parts.
We know 1 + 1 = 2 so we may use this prior understanding to understand that:
1/2 + 1/2 = 2

3.NF.2

duvalj76 — 2021-04-18 18:07:33 UTC

Understand a fraction as a number on the number line; represent fractions on a number line diagram.
- Understand that the interval 0 to 1 may be represented on a number line and partitioned to b equal parts. Recognize that each part has size 1/b. Each part below is 1/b (b equals 8 if partitioned into 8 equal parts) and one is added each time.

3.NF.3

duvalj76 — 2021-04-18 18:14:29 UTC

Explain equivalence of fractions in special cases and compare fractions by reasoning about their size.
a.) Understand two fractions as equivalent if they are the same size, or the same point on a number line.
b.) Recognize and generate simple equivalent fractions (e.g., 1/2 = 2/4)
c.) Express whole numbers as fractions, and recognize fractions that are equivalent to whole numbers. (e.g., 3 = 3/1)
d.) Compare two fractions with the same numerator or the same denominator by reasoning about their size. Recognize that comparisons are valid only when the two fractions represent the same whole. Use symbols <, >, or = and justify conclusions (e.g., using a visual fraction model.)

duvalj76 — 2021-04-18 18:22:36 UTC

a.) 4/8 is equal to 1/2 as they are at the same point on the number line of 1

duvalj76 — 2021-04-18 18:23:35 UTC

b.)

duvalj76 — 2021-04-18 18:24:37 UTC

c.)
3 divided by 1 = 3

duvalj76 — 2021-04-18 18:35:23 UTC

d.)

4.NF.1

duvalj76 — 2021-04-18 18:37:16 UTC

Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b) by using visual fraction models, with attention to how the number and size of the parts differ even though the two fractions themselves are the same size. Use this principle to recognize and generate equivalent fractions.

Example: 1/2 is equivalent to 1x2/2x2

4.NF.2

duvalj76 — 2021-04-18 18:44:00 UTC

Compare two fractions with different numerators and different denominators, e.g., by creating common denominators or numerators, or by comparing to a benchmark fraction such as 1/2. Recognize that comparisons are valid only when the two fractions refer to the same whole. Record the results of comparisons with symbols >, =, or <, and justify the conclusions, e.g., by using a visual fraction model.

4.NF.3

duvalj76 — 2021-04-18 18:44:08 UTC

Understand a fraction a/b with a > 1 as a sum of fractions 1/b.
a.) Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.
b.) Decompose a fraction into a sum of fractions with the same denominator in more than one way, recording each decomposition by an equation. Justify decompositions, e.g., by using a visual fraction model. Examples: 3/8 = 1/8 + 1/8 + 1/8 ; 3/8 = 1/8 + 2/8 ; 2 1/8 = 1 + 1 + 1/8 = 8/8 + 8/8 + 1/8.
c.) Add and subtract mixed numbers with like denominators, e.g., by replacing each mixed number with an equivalent fraction, and/or by using properties of operations and the relationship between addition and subtraction.
d.) Solve word problems involving addition and subtraction of fractions referring to the same whole and having like denominators, e.g., by using visual fraction models and equations to represent the problem.

4.NF.4

duvalj76 — 2021-04-18 18:44:13 UTC

Apply and extend previous understandings of multiplication to multiply a fraction by a whole number.
a.) Understand a fraction a/b as a multiple of 1/b. For example, use a visual fraction model to represent 5/4 as the product 5 × (1/4), recording the conclusion by the equation 5/4 = 5 × (1/4).
b.) Understand a multiple of a/b as a multiple of 1/b, and use this understanding to multiply a fraction by a whole number. For example, use a visual fraction model to express 3 × (2/5) as 6 × (1/5), recognizing this product as 6/5. (In general, n × (a/b) = (n × a)/b.)
c.) Solve word problems involving multiplication of a fraction by a whole number, e.g., by using visual fraction models and equations to represent the problem. For example, if each person at a party will eat 3/8 of a pound of roast beef, and there will be 5 people at the party, how many pounds of roast beef will be needed? Between what two whole numbers does your answer lie?

4.NF.5

duvalj76 — 2021-04-18 18:47:50 UTC

Express a fraction with denominator 10 as an equivalent fraction with denominator 100, and use this technique to add two fractions with respective denominators 10 and 100.² For example, express 3/10 as 30/100, and add 3/10 + 4/100 = 34/100.

Express a fraction with denominator 10 as an equivalent fraction with denominator 100.

4.NF.6

duvalj76 — 2021-04-18 18:47:55 UTC

Use decimal notation for fractions with denominators 10 or 100. For example, rewrite 0.62 as 62/100; describe a length as 0.62 meters; locate 0.62 on a number line diagram.

Rewrite fractions as decimals.

4.NF.7

duvalj76 — 2021-04-18 18:48:00 UTC

Compare two decimals to hundredths by reasoning about their size. Recognize that comparisons are valid only when the two decimals refer to the same whole. Record the results of comparisons with the symbols >, =, or <, and justify the conclusions, e.g., by using a visual model.

Note: Grade 4 expectations in this domain are limited to fractions with denominators 2, 3, 4, 5, 6, 8, 10, 12 & 100

duvalj76 — 2021-04-18 18:48:49 UTC

Note: Grade 3 expectations i this domain are limited to fractions with denominators 2, 3, 4, 6 & 8

duvalj76 — 2021-04-18 18:50:06 UTC

5.NF.1

duvalj76 — 2021-04-18 18:51:43 UTC

Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators.

For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12. (In general, a/b + c/d = (ad + bc)/bd.)

5.NF.2

duvalj76 — 2021-04-18 18:51:57 UTC

Solve word problems involving addition and subtraction of fractions referring to the same whole, including cases of unlike denominators, e.g., by using visual fraction models or equations to represent the problem. Use benchmark fractions and number sense of fractions to estimate mentally and assess the reasonableness of answers.

For example, recognize an incorrect result 2/5 + 1/2 = 3/7, by observing that 3/7 < 1/2.

5.NF.3

duvalj76 — 2021-04-18 18:52:00 UTC

Interpret a fraction as division of the numerator by the denominator (a/b = a ÷ b). Solve word problems involving division of whole numbers leading to answers in the form of fractions or mixed numbers, e.g., by using visual fraction models or equations to represent the problem.

For example, interpret 3/4 as the result of dividing 3 by 4, noting that 3/4 multiplied by 4 equals 3, and that when 3 wholes are shared equally among 4 people each person has a share of size 3/4. If 9 people want to share a 50-pound sack of rice equally by weight, how many pounds of rice should each person get? Between what two whole numbers does your answer lie?

5.NF.4

duvalj76 — 2021-04-18 18:52:07 UTC

Apply and extend previous understandings of multiplication to multiply a fraction or whole number by a fraction.
a.) Interpret the product (a/b) × q as a parts of a partition of q into b equal parts; equivalently, as the result of a sequence of operations a × q ÷ b. For example, use a visual fraction model to show (2/3) × 4 = 8/3, and create a story context for this equation. Do the same with (2/3) × (4/5) = 8/15. (In general, (a/b) × (c/d) = (ac)/(bd).
b.) Find the area of a rectangle with fractional side lengths by tiling it with unit squares of the appropriate unit fraction side lengths, and show that the area is the same as would be found by multiplying the side lengths. Multiply fractional side lengths to find areas of rectangles, and represent fraction products as rectangular areas.

5.NF.5

duvalj76 — 2021-04-18 18:52:15 UTC

Interpret multiplication as scaling (resizing), by:
a.) Comparing the size of a product to the size of one factor on the basis of the size of the other factor, without performing the indicated multiplication.
b.) Explaining why multiplying a given number by a fraction greater than 1 results in a product greater than the given number (recognizing multiplication by whole numbers greater than 1 as a familiar case); explaining why multiplying a given number by a fraction less than 1 results in a product smaller than the given number; and relating the principle of fraction equivalence a/b = (n × a)/(n × b) to the effect of multiplying a/b by 1.

Understanding that multiplying a number by a fraction greater than 1 results in a larger number and that multiplying a number by a fraction less than 1 results in a smaller number.

5 x 1 = 5 : so anything larger than one would result in a larger product. Anything less than one would result in a product less than the number.

5.NF.6

duvalj76 — 2021-04-18 18:52:19 UTC

Solve real world problems involving multiplication of fractions and mixed numbers, e.g., by using visual fraction models or equations to represent the problem.

5.NF.7

duvalj76 — 2021-04-18 18:52:23 UTC

Apply and extend previous understandings of division to divide unit fractions by whole numbers and whole numbers by unit fractions.
a.) Interpret division of a unit fraction by a non-zero whole number, and compute such quotients. For example, create a story context for (1/3) ÷ 4, and use a visual fraction model to show the quotient. Use the relationship between multiplication and division to explain that (1/3) ÷ 4 = 1/12 because (1/12) × 4 = 1/3.
b.) Interpret division of a whole number by a unit fraction, and compute such quotients. For example, create a story context for 4 ÷ (1/5), and use a visual fraction model to show the quotient. Use the relationship between multiplication and division to explain that 4 ÷ (1/5) = 20 because 20 × (1/5) = 4.
c.) Solve real world problems involving division of unit fractions by non-zero whole numbers and division of whole numbers by unit fractions, e.g., by using visual fraction models and equations to represent the problem. For example, how much chocolate will each person get if 3 people share 1/2 lb of chocolate equally? How many 1/3-cup servings are in 2 cups of raisins?

Summary

duvalj76 — 2021-04-18 19:18:55 UTC

Students in grade 3 begins their understanding that fractions are a set of equal parts partitioned from a whole number. Using number lines to represent fractions as b equal parts as the denominator in the fraction. Students of this grade level will understand comparing fractions with alike or different denominators and numerators if equal, more, or less, using symbols >, <, & =.

Summary

duvalj76 — 2021-04-18 19:27:59 UTC

Students in grade 4 will develop knowledge of fractions represented as decimals. Comparison knowledge will be strengthened using symbols <,>, & = as well strengthening conversion skill of fractions to decimals.

Students in grade 4 will also develop knowledge and understanding of how fractions' numbers may be different between two fractions but the size of the fractions are equivalent. As well as comparing fractions with different numerators and different denominators.

Word problems will also be introduced in this grade level. Including the use of whole numbers and fractions. Multiplying fractions and whole numbers will also be practiced.

Multiplying, adding, and subtracting fractions with other fractions and whole numbers is content included within this grade level.

Summary

duvalj76 — 2021-04-18 19:46:53 UTC

Students will be introduced to adding and subtracting fractions with unlike denominators. This will be done by replacing given fractions with equivalent fractions. These equations will also be represented and solved within word problems. Using models to represent addition and subtraction of fractions with unlike denominators work the same for calculations of fractions with like denominators.

Development of calculating sums and differences of fractions. Students will also be able to make reasonable estimates of them. Students will be able to use the meaning of fractions of multiplication and division, and the relationship between the two explain why the procedures of multiplying and dividing fractions makes sense.