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125x35x16用简便方法计算

125×35×16 =125×35×4×4 =500×140 =70000

运算定律与简便计算 (一)加减法运算定律 1.加法交换律 定义:两个加数交换位置,和不变 例如:16+23=23+16 546+78=78+546 2.加法结合律 定义:先把前两个数相加,或者先把后两个数相加,和不变。 注意:加法结合律有着广泛的应用,如果其中有...

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35x125x16 =35x125x8x2 =35x2x(125x8) =70x1000 =70000

408-12×24 = 408 - 288 = 120 (46+28)×60 = 74 x 60 = 4440 42×50-17 = 2100- 17 = 2083 32+105÷5 = 32 + 21 = 53 420×(327-238) = 420 x 89 = 37380 (4121+2389)÷7 = 6510 ÷7 = 930 3.416÷(0.016×35) = 3.416 ÷0.56 = 6.1 0.8×[(10...

125×6×8 600÷25÷4 755-122-78 138×25×4 25×32 125×16 234×80×5 781-499 12×25 4004×25 25×16×125 (125+16)×8 75×24 789×99 800÷125 1736+403 9999+999+99+9 158+262+138 375+219+381+225 5001-247-1021-232 (181+2564)+2719 378+...

408-12×24 = 408 - 288 = 120 (46+28)×60 = 74 x 60 = 4440 42×50-17 = 2100- 17 = 2083 32+105÷5 = 32 + 21 = 53 420×(327-238) = 420 x 89 = 37380 (4121+2389)÷7 = 6510 ÷7 = 930 3.416÷(0.016×35) = 3.416 ÷0.56 = 6.1 0.8×[(10...

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