五上数学《小数简便运算》专项训练
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简介
五上数学《小数简便运算》专项训练 25.4×1.25×0.8 =25.4×(1.25×0.8) =25.4×1 =25.4 5.74×29-5.74×19 =5.74×(29-19) =5.74×10 =57.4 8×(12.5-0.125) =8×12.5-8×0.125 =100-1 =99 2.31×1.2×0.5 =2.31×(1.2×0.5) =2.31×0.6 =1.386 2.95×101-2.95 =2.95×(101-1) =2.95×100 =295 (1.25+0.25)×4 =1.25×4+0.25×4 =5+1 =6 25×3.2×2.5 =(25×0.4)×(4×2.5)×2 =10×10×2 =200 0.78×16.5-0.78×15.5 =0.78×(16.5-15.5) =0.78×1 =0.78 76×0.3+5.24×0.3+0.3 =0.3×(76+5.24+1) =0.3×82.24 =24.672 36.5-36.5×0.95 =36.5×(1-0.95) =36.5×0.05 =1.825
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