计算:(1)34×56×45-12(2)89×(1.25-34)÷23.-数学

题目简介

计算:(1)34×56×45-12(2)89×(1.25-34)÷23.-数学

题目详情

计算:
(1)
3
4
×
5
6
×
4
5
-
1
2

(2)
8
9
×(1.25-
3
4
)÷
2
3
题型:解答题难度:中档来源:不详

答案

(1)class="stub"3
4
×class="stub"5
6
×class="stub"4
5
-class="stub"1
2

=class="stub"5
8
×class="stub"4
5
-class="stub"1
2

=class="stub"1
2
-class="stub"1
2

=0;

(2)class="stub"8
9
×(1.25-class="stub"3
4
)÷class="stub"2
3

=class="stub"8
9
×class="stub"1
2
÷class="stub"2
3

=class="stub"4
9
×class="stub"3
2

=class="stub"2
3

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