计算,能简算的要简算①49÷(56-12)②10.5×(3.8-0.8)÷6.3③118×17-17×38④1-118×433÷72.-数学

题目简介

计算,能简算的要简算①49÷(56-12)②10.5×(3.8-0.8)÷6.3③118×17-17×38④1-118×433÷72.-数学

题目详情

计算,能简算的要简算
4
9
÷(
5
6
-
1
2

②10.5×(3.8-0.8)÷6.3
11
8
×17-17×
3
8

④1-
11
8
×
4
33
÷
7
2
题型:解答题难度:中档来源:不详

答案

class="stub"4
9
÷( class="stub"5
6
-class="stub"1
2

=class="stub"4
9
÷class="stub"1
3

=class="stub"4
9
×3,
=class="stub"4
3

②10.5×(3.8-0.8)÷6.3
=10.5×3÷6.3,
=31.5÷6.3,
=5;
class="stub"11
8
×17-17×class="stub"3
8

=(class="stub"11
8
-class="stub"3
8
)×17,
=1×17,
=17;
④1-class="stub"11
8
×class="stub"4
33
÷class="stub"7
2

=1-class="stub"1
6
×class="stub"2
7

=1-class="stub"1
21

=class="stub"20
21

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