32×4 = 58×2 = 110×6 = 104×50 =
4×81 = 42×20 = 103×3 = 209×7 =
37×2 = 80×200 = 900×5 = 310×4 =
4×81 = 42×20 = 103×3 = 209×7 =
37×2 = 80×200 = 900×5 = 310×4 =
答案:
128 116 660 5200
324 840 309 1463
74 16000 4500 1240
324 840 309 1463
74 16000 4500 1240
1. 根据乘法分配律,在□里填数,在〇里填运算符号。
(1)47×28 + 47×72 = 47×(□〇□)
(2)36×104 - 36×4 = 36×(□〇□)
(3)27×999 + 27 = □×(□〇□)
(4)84×101 = □〇(□〇□)
(1)47×28 + 47×72 = 47×(□〇□)
(2)36×104 - 36×4 = 36×(□〇□)
(3)27×999 + 27 = □×(□〇□)
(4)84×101 = □〇(□〇□)
答案:
(1)28 + 72 (2)104 - 4
(3)27 999 + 1
(4)84 × 100 + 1
(3)27 999 + 1
(4)84 × 100 + 1
2. 计算下面各题,怎样简便就怎样计算。
134×7 + 166×7 125×88 99×32 + 32
74×101 - 74 20×52 - 20×2 48×(100 - 1)
134×7 + 166×7 125×88 99×32 + 32
74×101 - 74 20×52 - 20×2 48×(100 - 1)
答案:
2100 11000 3200 7400 1000 4752
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