脱式计算,能简算的要简算.631-4983.7×2.5+2.5×4.35×32×1.2523÷(45-23)×53.-数学

题目简介

脱式计算,能简算的要简算.631-4983.7×2.5+2.5×4.35×32×1.2523÷(45-23)×53.-数学

题目详情

脱式计算,能简算的要简算.
631-498
3.7×2.5+2.5×4.3
5×32×1.25
2
3
÷(
4
5
-
2
3
)×
5
3
题型:解答题难度:中档来源:不详

答案

(1)631-498
=631-(500-2),
=631-500+2,
=133;
(2)3.7×2.5+2.5×4.3
=(3.7+4.3)×2.5,
=8×2.5,
=20;
(3)5×32×1.25
=5×(4×8)×1.25,
=(5×4)×(8×1.25),
=20×10,
=200;

(4)class="stub"2
3
÷(class="stub"4
5
-class="stub"2
3
)×class="stub"5
3

=class="stub"2
3
÷class="stub"2
15
×class="stub"5
3

=class="stub"2
3
×class="stub"15
2
×class="stub"5
3

=class="stub"25
3

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