Which one doesn’t belong?

Circle 2 sums or differences you think would be the most challenging to find.

Find the value of one of these expressions. Show your thinking.

Choose 2 other expressions and find the values. Show your thinking.

Choose one value that you think was less challenging to find. Explain.

Choose one value that you think was more challenging to find. Explain.

31 + 25

43 + 28

89 - 22

40 - 28

15 + 72

85 - 37

95 - 81

37 + 55

25 + 25

63 - 19

72 - 68

21 + 59