(2014-2015 Grade 4/5) Paper Problem Solving by Chris Echlin https://padlet.com/echlin/ad9ooihfgpth How long will it take to put these papers in class sets? en-us 2015-02-11 22:32:25 UTC 2015-02-11 22:35:18 UTC hello@padlet.com Follow up discussion echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621215 We watched the time lapse video of the students actually counting out the papers, and instead of 3.4 minutes it took almost 15. We discussed why there were differences between the calculated time and the actual time. We did not take into account:

1. Putting the stacks into the envelopes

2. Organizing the envelopes

3. All 7 students cannot count from the same stack at the same time

4. They are not counting continuously, there is transition time

5. They are talking with each other, so they are not all counting as fast as they can.

]]> 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621215 Class Discussion echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621216 We divided 33 (classes) by 7 (students) and got 4.7. We rounded up to 5. Then we multiplied 41 (seconds) x 5.

We got 205 total seconds to count the sheets.

]]> 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621216 Class Discussion echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621217 The time column increases by 41 each stage. The classes column increases by 7 each stage. We can solve it using patterning

]]> 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621217 Class Discussion echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621219 We decided to work it out using a graphic organizer (t-table).

Time Classes
41 7
82 14
123 21
164 28
205 33
]]> 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621219 Response echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621220 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621220 Student Thoughts echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621221 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621221 The students are counting at the SAME time so it takes 7 people 41 seconds to count 7 classes echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621222 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621222 What are we thinking? echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621223 We think we need to multiply 41 (seconds) by 7 (people) to see how long it takes them to count 1 class each.

]]> 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621223 This would give you the amount of papers per classroom, not total time, and we already know that there are 25 papers per class. echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621224 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621224 What are we thinking? echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621225 We think we need to divide 900 (papers) by 33 (classes).

]]> 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621225 This would be correct if ONLY 1 person were counting, but there are 7 people counting. echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621226 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621226 What are we thinking? echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621227 We think we need to use multiplication. If we multiply 33 (classes) x 41 (seconds) we will get the total time.

]]> 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621227 What information do we think is important echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621228 We know that it takes 41 seconds to count out 1 class.

We know that there are 33 classes.

We know that there are 7 people counting.

]]> 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621228 How will you solve the problem? echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621229 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621229 Nikeal anonymous8 https://padlet.com/echlin/ad9ooihfgpth/wish/49621230 Do they count by 1's or 5's?

]]> 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621230 Answers echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621231 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621231 Questions echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621232 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621232 We tested 4 students counting to 25 papers and the MEAN time was 41 seconds. echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621233 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621233 Siya anonymous8 https://padlet.com/echlin/ad9ooihfgpth/wish/49621234 Use a timer to see how long it takes 1 person to count 25 papers

]]> 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621234 By 1's echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621235 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621235 7 students echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621236 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621236 33 classes echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621237 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621237 25 per class echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621238 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621238 900 echlin https://padlet.com/echlin/ad9ooihfgpth/wish/49621239 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621239 Keerat & Rushil anonymous8 https://padlet.com/echlin/ad9ooihfgpth/wish/49621240 How many students helped with the counting?

]]> 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621240 Khushpreet anonymous8 https://padlet.com/echlin/ad9ooihfgpth/wish/49621241 How fast does 1 person count?

]]> 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621241 Siya! anonymous8 https://padlet.com/echlin/ad9ooihfgpth/wish/49621242 How many papers are in a class set?

]]> 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621242 Dilshan anonymous8 https://padlet.com/echlin/ad9ooihfgpth/wish/49621243 How many classes are there?

]]> 2015-02-11 22:32:25 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621243 Ishreet anonymous8 https://padlet.com/echlin/ad9ooihfgpth/wish/49621244 How many pieces of paper are there?

]]> 2015-02-11 22:32:26 UTC https://padlet.com/echlin/ad9ooihfgpth/wish/49621244