用你喜欢的方法脱式计算.(1)128+750÷25×18(2)(800×45-360)÷40(3)138×37+38×37(4)[1-(12-14)]×23.-六年级数学

题目简介

用你喜欢的方法脱式计算.(1)128+750÷25×18(2)(800×45-360)÷40(3)138×37+38×37(4)[1-(12-14)]×23.-六年级数学

题目详情

用你喜欢的方法脱式计算.
(1)128+750÷25×18
(2)(800×
4
5
-360)÷40
(3)
13
8
×
3
7
+
3
8
×
3
7

(4)[1-(
1
2
-
1
4
)]×
2
3
题型:解答题难度:中档来源:不详

答案

(1)128+750÷25×18
=128+30×18,
=128+540,
=668;

(2)(800×class="stub"4
5
-360)÷40
=(640-360)÷40,
=280÷40,
=7;

(3)class="stub"13
8
×class="stub"3
7
+class="stub"3
8
×class="stub"3
7

=(class="stub"13
8
+class="stub"3
8
)×class="stub"3
7

=2×class="stub"3
7

=class="stub"6
7


(4)[1-(class="stub"1
2
-class="stub"1
4
)]×class="stub"2
3

=[1-class="stub"1
4
class="stub"2
3

=class="stub"3
4
×class="stub"2
3

=class="stub"1
2

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