问题
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用递等式计算(能简算的要用简便方法计算).①13×8×125②8.9×99+1.1×99③12.12÷(4.3×2-7.4)④47×724+15÷65⑤14÷(1-
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计算,能简算的要简算10÷0.2÷2.564×4.5+3.6×451.25×3.2×0.814.5×1028.4÷0.21÷0.50.8×[(5-0.68)÷1.2].
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计算.能简算的要简算,并写出简算过程.(1)(0.12+0.22+0.32+0.42)2÷(0.13+0.23+0.33+0.43)(2)3.97÷7+17×4.03-
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计算下面各题,能简算的要简算. 4.05-2.8-0.71.25×32×2.5[1-(12-14)]×2399.9×98+(0.8-35)×999.
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计算下面各题,能简算的要简算. 102×4.57.8×6.9+2.2×6.95.6×1.25.
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脱式计算,能简算的要简算3411+337+671147×2.8+52×2.8+2.837.6-4.87-1.1331-[0.5×(6-5.7)+18]9.3÷[24×(1-38)