G3T13.2: Adding mentally using the compensation strategy Flashcards Preview

Grade 4 Maths > G3T13.2: Adding mentally using the compensation strategy > Flashcards

Flashcards in G3T13.2: Adding mentally using the compensation strategy Deck (20)
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1
Q

39+14=

Method:
39+1 14-1
40+13=

39+14=

A

53

2
Q

37+59

Method:
37-1 59+1
36+60=

37+59=

A

96

3
Q

49+36

A

85

4
Q

29+15

A

44

5
Q

39+22

A

61

6
Q

26+29

A

55

7
Q

37+49

A

86

8
Q

43+49

A

92

9
Q

390+140

Method:
390+10 140-10

400+130=
390+140=

A

530

10
Q

490+230

A

720

11
Q

150+490

A

640

12
Q

630+290

A

920

13
Q

590+260

A

860

14
Q

590+170

A

760

15
Q

450+290

A

740

16
Q

690+250

A

940

17
Q

530+190

A

720

18
Q

450+390

A

840

19
Q

110+330

A

440

20
Q

940+90

A

1030