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3.258乘五点六列竖式计算并验算

3.258 × 5.6 = 18.2448 竖式见图: 验算: 5.6 × 3.258 = 18.2448

5.9-3.58=2.32 验算

3.2 × 58 = 185.6 竖式见图:

(1)297+586=883;(2)600-58=542;(3)636-519=117;

3.58×2≈7.2

15.5

47×6点5 3点2×58的简便运算 47×6点5 3点2×58 =305.5+185.6 =491.1

(1)0.58×0.24=0.1392(2)3.42×0.25=0.855(3)1.57÷3.9=0.4

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