用简便方法计算,写出简算过程
(1)2.5×3.2×1.25 (2)4.05﹣(2.05+)
(3)5.39++4.61+ (4)0.588×+4×9.412+×0.588.
计算下面各题,能简算的要简算
1243﹣1334÷23×12 2×3.14×8×5+3.14×82 8.86﹣5.29﹣1.71﹣1.86
+(1﹣)×÷ 85×0.75+16×75%﹣.
简算:
①57.5﹣14.25﹣15 ②102.31×59
③(×10.68+8.52×)÷1 ④0.1+0.2+0.3+0.4+…+0.9+0.1+0.11+0.12+…+0.98+0.99.
递等式计算.(能简便运算的要用简便方法计算)
14760÷36﹣24×11 5.2×4.5+4.5×3.8+4.5 12.5×25×0.4×0.8
5﹣(÷+) 4.8÷16+〔1÷(5﹣5.09)〕 [4.2+(5.36﹣1.2)÷0.26]÷20.
试题篮
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