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1600÷25×3.5简便运算

1600÷25×3.5简便运算 解:运用凑整法 原式=1600x4÷(25x4)x3.5 =6400÷100x3.5 =64x3.5 =64x(3+0.5) =64x3+64x0.5 =192+32 =224

(1)32×46+32×54=32×(46+54)=3200 (2)6.46-3.54-2.46=6.46-2.46-3.54=0.46 (3)99×48+48=48×(99+1)=4800 (4)125×7×5×8=125×8×7×5=35000 (5)1600÷25=16×100÷25=64 (6)4300÷125÷8=4300÷(125×8)=4.3 (7)25.23-7.85-2.15=25.23-...

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