合理灵活地计算下列各题.46×8-120÷523+(45-23)×533.4×2.77+0.23×3.445×7.7+3.3×0.8-80%-六年级数学

题目简介

合理灵活地计算下列各题.46×8-120÷523+(45-23)×533.4×2.77+0.23×3.445×7.7+3.3×0.8-80%-六年级数学

题目详情

合理灵活地计算下列各题.
46×8-120÷5
2
3
+(
4
5
-
2
3
)×
5
3
3.4×2.77+0.23×3.4
4
5
×7.7+3.3×0.8-80%
题型:解答题难度:中档来源:不详

答案

(1)46×8-120÷5,
=368-24,
=346;

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

=class="stub"2
3
+(class="stub"12
15
-class="stub"10
15
)×class="stub"5
3

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

=class="stub"2
3
+class="stub"2
9

=class="stub"6
9
+class="stub"2
9

=class="stub"8
9


(3)3.4×2.77+0.23×3.4,
=3.4×(2.77+0.23),
=3.4×3,
=10.2;

(4)class="stub"4
5
×7.7+3.3×0.8-80%,
=(7.7+3.3-1)×0.8,
=10×0.8,
=8;

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