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脱式计算.(能简算的要简算)(50-40×1.2)÷0.58×4×125×25 18.8- 2
脱式计算.(能简算的要简算)(50-40×1.2)÷0.58×4×125×2518.8-23-3.8-1332×71.1+28.9×32....
脱式计算.(能简算的要简算)(50-40×1.2)÷0.58×4×125×25 18.8- 2 3 -3.8- 1 3 32×71.1+28.9×32.
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①(50-40×1.2)÷0.5 =(50-48)÷0.5 =2÷0.5 =4; ②8×4×125×25 =(8×125)×(4×25) =1000×100 =100000; ③18.8-
=(18.8-3.8)-(
=15-1 =14; ④32×71.1+28.9×32 =32×(71.1+28.9) =32×100 =3200. |
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