一、口算。
37 + 8 = 9 + 72 = 19 + 9 =
85 + 6 = 88 + 8 = 15 + 9 =
59 + 5 = 34 + 7 = 8 + 23 =
36 + 8 = 74 + 9 = 9 + 81 =
82 + 8 = 18 + 7 = 7 + 17 =
4 + 29 = 68 + 4 = 6 + 29 =
84 + 6 = 45 + 6 = 58 + 9 =
6 + 44 = 83 + 7 = 69 + 6 =
44 + 8 = 5 + 27 = 75 + 5 =
8 + 35 = 76 + 7 = 69 + 3 =

一、45 81 28 91 96 24 64 41 31 44 83 90 90 25 24 33 72 35 90 51 67 50 90 75 52 32 80 43 83 72

二、把正确的得数圈起来。
38 + 5(53 43) 46 + 5(51 96) 48 + 4(52 88)
9 + 32(22 41) 64 + 8(72 82) 86 + 5(81 91)
59 + 6(55 65) 86 + 4(96 90) 7 + 56(63 72)