脱式计算(能简算的要简算)0.75×4×0.25×4 9.6+9.9×99 1
脱式计算(能简算的要简算)0.75×4×0.25×49.6+9.9×9915.58÷8.2-0.724.536÷0.8÷142.8×3.6+1.4×2.86.3×10.1...
脱式计算(能简算的要简算)0.75×4×0.25×4 9.6+9.9×99 15.58÷8.2-0.72 4.536÷0.8÷14 2.8×3.6+1.4×2.8 6.3×10.1.
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①0.75×4×0.25×4, =0.75×(4×0.25)×4, =0.75×1×4, =3; ②9.6+9.9×99, =9.6+980.1, =989.7; ③15.58÷8.2-0.72, =1.9-0.72, =1.18; ④4.536÷0.8÷14, =5.67÷14, =0.405; ⑤2.8×3.6+1.4×2.8, =(3.6+1.4)×2.8, =5×2.8, =14; ⑥6.3×10.1, =6.3×(10+0.1), =6.3×10+6.3×0.1, =63+0.63, =63.63. |
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