Megan's Virtual Classroom Project by

meaganj789 — 2024-11-13 19:58:45 UTC

Hey friends! My name is Megan Godeke. I am studying to be an elementary teacher. I enjoy working with children and I hope to change their lives for the better.

meaganj789 — 2024-11-14 15:20:32 UTC

Today we will learn or refresh our memory over the different ways to add whole numbers. You'd be surprised of the many ways we can add!

Adding of Whole Numbers

meaganj789 — 2024-11-15 14:28:02 UTC

Watch this video for some ways we can add in our head. Stop the video at 3:30.

meaganj789 — 2024-11-15 14:29:34 UTC

Associative Property of Addition

meaganj789 — 2024-11-15 14:33:45 UTC

Watch this video to get the understanding of the Associative Property.

meaganj789 — 2024-11-15 14:34:07 UTC

https://youtu.be/ohn18Ao20VI?si=hdRABGFjIw3brZO-

Commutative Property

meaganj789 — 2024-11-15 14:36:46 UTC

Watch this video to get an understanding of Commutative Property

meaganj789 — 2024-11-15 14:36:55 UTC

Left to Right Method

meaganj789 — 2024-11-15 14:46:13 UTC

Breaking up & Bridging Method

meaganj789 — 2024-11-15 14:47:01 UTC

Try these questions using the method.

1)59+42=

2)76+34=

3)32+67=

meaganj789 — 2024-11-15 14:56:02 UTC

Try solving these questions using the left to right method.

1) 76+25=

2) 42+36=

3) 67+58=

Answer Key

meaganj789 — 2024-11-15 14:57:22 UTC

1) 76+25= 101

70+20=90

6+5=11

90+11=101

2) 42+36= 78

40+30=70

6+2=8

70+8=78

3) 67+58= 125

60+50=110

7+8=15

110+15=125

Associative or Commutative Property?

meaganj789 — 2024-11-15 15:05:24 UTC

Which property do you think this is?

(2+3) +5 = (5+2) + 3

What about this one?

(2+3) +5 = 2+(3+5)

Answer Key

meaganj789 — 2024-11-15 15:10:25 UTC

(2+3) + 5 = (5+2) + 3

Commutative Property

(2+3) + 5 = 2 + (3+5)

Associative Property

Have you've seen these methods before?

meaganj789 — 2024-11-15 15:19:52 UTC

Before teaching, these methods were new to me and I found them very interesting! For the following questions, I want you to use both the Left to right method and the breaking up & bridging method. I want you to notice the difference in the two and find the one that you think is easier to use.

meaganj789 — 2024-11-15 15:27:43 UTC

1)140+28=

2)64+22=

3)25+32=

4)147+212=

Answer Key

meaganj789 — 2024-11-15 15:30:29 UTC

1)140+28=168

LR: 100+20=120

40+8=48

120+48=168

BB:140+20=160

160+8=168

2)64+22=86

LR: 60+20=80

4+2=6

80+6=86

BB: 64+20=84

84+2=86

3)25+32=57

LR:20+30=50

5+2=7

50+7=57

BB: 25+30=55

55+2=57

4)147+212=359

LR:100+200=300

40+10=50

7+2=9

300+50+9=359

BB:147+200=347

347+12=359

Answer key

meaganj789 — 2024-11-15 15:52:49 UTC

1)59+42=101

59+40=99

99+4=101

2)76+34=110

76+30=106

106+4=110

3)32+67=99

32+60=92

92+7=99

How did you do?