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列竖式计算 8.32×2.5

(1)8.32×2.5=20.8; 8.3 2×2.5 . 4160 16 6 4 . 20.800 (2)7.45÷3.8≈1.70; (3)X×72=4896,X×72÷72=4896÷72, X=68;(4)1134÷X=27,1134÷X×X=27×X, 27×X÷27=1134÷27, X=42;(5)X÷9=360,X÷9×9=360×9, X=3240.

如图

(1)86×5=430;(2)63×7=441;(3)54×8=432;(4)32×8=256.

如图

250/32.8约等于7.62

32.8除以1.2=27.33 仅供参考

0.32×2.5+7.2 =0.8×0.4×2.5+7.2 =0.8×(0.4×2.5)+7.2 =0.8×1+7.2 =0.8+7.2 =8

8/9×15/32×3/20= (8/32)×(15/20)×(3/9)=1/4×3/4×1/3=1/16

8.032÷11.2≈0.71

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