计算下列各题.49×37+49÷74(简算)12.5×0.32×2.5(简算)4.8×(11.08-15.6÷7.5)(34-23)÷23×16.-数学
题文
计算下列各题.
12.5×0.32×2.5(简算) 4.8×(11.08-15.6÷7.5) (
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答案
(1)
=
=(
=1×
=
(2)12.5×0.32×2.5, =12.5×0.8×0.4×2.5, =(12.5×0.8)×(0.4×2.5), =10×1, =10; (3)4.8×(11.08-15.6÷7.5), =4.8×(11.08-2.08), =4.8×9, =43.2; (4)(
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