Show:
IPA
CPA
APA
CPA & APA
100

2+0=

2+0=2

100

4+1=   1+___=

4+1=5   1+4=5

100

(1+3)+2=    1+(3+2)=

(1+3)+2=    1+(3+2)=

4+2=6          1+5=6

100

2+3+4= ____ 3+4+2=_____

2+3+4=9     3+4+2=9

200

7+0=

7+0= 7

200

5+6=      ___+____= 

5+6= 11    6+5=11

200

Solve the sum using APA: 

3+7+1=


(3+7)+1=         3+(7+1)= 

10+1= 11          3+8=11


200

Solve it.

9+2+3=    2+3+__=

9+2+3= 14   2+3+9=14

300

0+9= 

0+9= 9

300

3+___=         4+___=

3+4=7     4+3=7

300

7+4+8= 

(7+4)+8=     7+(4+8)=

11+8=19       7+12=19

300

Solve the following sum by using CPA

20+3= 

20+3= 23      3+20=23

400

0+4+0=

0+4+0=4

400

2+4+1= ____  ___+___+___= 

4+1+2=7   

4+2+1=7

1+2+4=7

1+4+2=7

400

10+3+2=

(10+3)+2=       10+(3+2)=

13+2=15           10+5=15

400

What is the property? Solve it. 

(20+30)+2= 

It is APA. 

(20+30)+2=         20+(30+2)=

50+2=52              20+32= 52

500

0+9+4= 

Is this sum IPA?

No, it is not. 
500

4+2=6; 2+4=6 

Is this CPA?

Yes, it is. 

500

Explain what is assosiative property of addition.

It is to Changing the grouping of addends does not change the sum. 

500

Solve the following addition by using the APA. 

40+2+4= 

(40+2)+4=  40+(2+4)=

42+4=46      40+6= 46