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Addition
Subtraction
Explain your thinking
Examples
100

24+13=

37

100

52-21=

31

100

Solve 34+12 and explain how you got your answer.

46

100

32+15=

47

200

36+22=

58

200

63-14=

49

200

Solve 56-24 and explain how you got your answer.

32

200

48-12=

36

300

47+18=

65

300

75-23=

52

300

Solve 42+17 in two ways.

59

300

Solve 45+23 and explain how you got your answer.

68