二年级100以内加减法用多长时间完成
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1、62 - 30 = 38 - 28 = 44 - 28 = 90 - 8 = 1 - 1 = 31 - 25 = 90 - 18 = 73 - 28 = 25 - 16 = 81 - 39 = 71 - 4 = 2 - 2 = 42 - 38 = 31 - 11 = 24 - 19 = 90 - 8 = 39 - 19 = 15 - 14 = 71 - 55 = 75 - 46 = 59 - 19 = 86 - 46 = 69 - 61 = 4 - 4 = 68 - 19 = 73 - 36 = 90 - 9 = 62 - 27 = 30 - 25 = 23 - 2 = 93 - 78 = 67 - 62 = 83 - 29 = 32 - 24 = 70 - 48 = 75 - 73 = 63 - 19 = 18 - 1 = 77 - 17 = 69 - 7 = 52 - 22 = 4 - 4 = 88 - 59 = 24 - 15 = 45 - 24 = 12 + 37 =63 + 3 =66 + 2 =71 + 17 =76 + 10 =21 + 13 =48 + 2 =94 + 3 =27 + 15 =8 + 57 =47 + 2 =85 + 10 =66 + 26 =40 + -1 =3 + 37 =63 + 29 =40 + 48 =27 + 50 =33 + 31 =28 + 6 =15 + 21 =46 + 33 =95 + 1 =12 + 85 =41 + 32 =21 + 20 =87 + 7 =67 + 16 =49 + 35 =4 + 49 =77 + 6 =33 + 15 =88 + 5 =37 + 59 =22 + 3 =68 + 24 =10 + 30 =79 + 1 =2 + 95 =54 + 34 =70 + 5 =73 + 2 =81 + 13 =75 + 10 =40 + 3 =。
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