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计算下列各题 能简算的要简算.①5.25×3.6+5.25×3.4+5.25②(0.75+0
问题详情
计算下列各题,能简算的要简算.
①5.25×3.6+5.25×3.4+5.25
②(0.75+0.2)÷0.25×250%
③
④13×(
参考答案
①5.25×3.6+5.25×3.4+5.25,
=5.25+(3.6+3.4+1),
=5.25×8,
=42;
②(0.75+0.2)÷0.25×250%,
=0.95÷0.25×2.5,
=3.8×2.5,
=9.5;
③18÷[(58-13)×37],
=18÷[724×37],
=18÷18,
=1;
④13×(329+113)×29,
=(13×29)×(329+113),
=(29×329×13)+(13×113×29),
=(3×13)+(1×29),
=39+29,
=68.
考点: