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脱式计算.(能简算的要简算) ①1.258×18.5-0.258×18.5 ②8.48÷0
脱式计算.(能简算的要简算)①1.258×18.5-0.258×18.5②8.48÷0.8×0.9③1.25×2.4④5.85÷(1.3+0.5)×6....
脱式计算.(能简算的要简算) ①1.258×18.5-0.258×18.5 ②8.48÷0.8×0.9 ③1.25×2.4 ④5.85÷(1.3+0.5)×6.
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①1.258×18.5-0.258×18.5, =18.5×(1.258-0.258), =18.5×1, =18.5; ②8.48÷0.8×0.9, =10.6×0.9, =9.54; ③1.25×2.4, =1.25×8×0.3, =10×0.3, =3; ④5.85÷(1.3+0.5)×6, =5.85÷1.8×6, =3.25×6, =19.5. |
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