计算,能简算的要简算 10÷0.2÷2.5 8.4÷0.21÷0.5 1.25×3.2×0.25 14.5×102 14.64+3.7×2.
计算,能简算的要简算10÷0.2÷2.58.4÷0.21÷0.51.25×3.2×0.2514.5×10214.64+3.7×2.83.5×0.7+7.5×0.7-0.7...
计算,能简算的要简算 10÷0.2÷2.5 8.4÷0.21÷0.5 1.25×3.2×0.25 14.5×102 14.64+3.7×2.8 3.5×0.7+7.5×0.7-0.7.
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①10÷0.2÷2.5, =10÷(0.2×2.5), =10÷0.5, =20; ②8.4÷0.21÷0.5, =40÷0.5, =80; ③1.25×3.2×0.25, =(1.25×8)×(0.4×0.25), =10×0.1, =1; ④14.5×102, =14.5×(100+2), =14.5×100+14.5×2, =1450+29, =1479; ⑤14.64+3.7×2.8, =14.64+10.36, =25; ⑥3.5×0.7+7.5×0.7-0.7, =0.7×(3.5+7.5-1), =0.7×10, =7. |
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