计算.(能简算的要简算)14.4÷0.125÷81.5×45+0.8×5.5+2×45920÷40+23×9959+311+49+8111005÷[42×(56-57)]35÷[1-(15+17)]848-80÷16×2729×17131+29131×114.-数学
题文
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答案
(1)14.4÷0.125÷8, =14.4÷(0.125×8), =14.4÷1, =14.4; (2)1.5×
=1.5×0.8+0.8×5.5+2×0.8, =(1.5+5.5+2)×0.8, =9×0.8, =7.2; (3)920÷40+23×99, =23+23×99, =23×(1+99), =23×100, =2300; (4)
=(
=1+1, =2; (5)1005÷[42×(
=1005÷[42×
=1005÷[35-30], =1005÷5, =201; (6)35÷[1-( |