脱式计算.(能简算的要简算)0.125×0.25×8×4[5-1.7÷(2-1)]×187×38649÷(79+49)×1143.9÷1.5-2.3×0.5112÷34-58×1635.-数学

题目简介

脱式计算.(能简算的要简算)0.125×0.25×8×4[5-1.7÷(2-1)]×187×38649÷(79+49)×1143.9÷1.5-2.3×0.5112÷34-58×1635.-数学

题目详情

脱式计算.(能简算的要简算)
0.125×0.25×8×4[5-1.7÷(2-1)]×187×
3
86
4
9
÷(
7
9
+
4
9
)×
11
4
3.9÷1.5-2.3×0.51
1
2
÷
3
4
-
5
8
×
16
35
题型:解答题难度:中档来源:不详

答案

(1)0.125×0.25×8×4,
=(0.125×8)×(0.25×4),
=1×1,
=1;

(2)[5-1.7÷(2-1)]×1,
=[5-1.7÷1]×1,
=[5-1.7]×1,
=3.3×1,
=3.3;

(3)87×class="stub"3
86

=(86+1)×class="stub"3
86

=86×class="stub"3
86
+1×class="stub"3
86

=3+class="stub"3
86

=3class="stub"3
86


(4)class="stub"4
9
÷(class="stub"7
9
+class="stub"4
9
)×class="stub"11
4

=class="stub"4
9
÷class="stub"11
9
×class="stub"11
4

=class="stub"4
11
×class="stub"11
4

=1;

(5)3.9÷1.5-2.3×0.5,
=2.6-1.15,
=1.45;

(6)1class="stub"1
2
÷class="stub"3
4
-class="stub"5
8
×class="stub"16
35

=2-class="stub"2
7

=1class="stub"5
7

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