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+0.2)÷0.25×250%③18÷[(58-13)×37]④13×(329+113)×29.-数学

题目简介

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+0.2)÷0.25×250%③18÷[(58-13)×37]④13×(329+113)×29.-数学

题目详情

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%
1
8
÷[(
5
8
-
1
3
3
7
]

④13×(
3
29
+
1
13
)×29
题型:解答题难度:中档来源:不详

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;

class="stub"1
8
÷[(class="stub"5
8
-class="stub"1
3
)×class="stub"3
7
]

=class="stub"1
8
÷[class="stub"7
24
×class="stub"3
7
],
=class="stub"1
8
÷class="stub"1
8

=1;

④13×(class="stub"3
29
+class="stub"1
13
)×29

=(13×29)×(class="stub"3
29
+class="stub"1
13
),
=(29×class="stub"3
29
×13)+(13×class="stub"1
13
×29),
=(3×13)+(1×29),
=39+29,
=68.

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