74÷13+15÷43-32.-数学

题目简介

74÷13+15÷43-32.-数学

题目详情

7
4
÷
1
3
+15÷
4
3
-
3
2
题型:解答题难度:中档来源:不详

答案

class="stub"7
4
÷class="stub"1
3
+15÷class="stub"4
3
-class="stub"3
2

=class="stub"7
4
×3+15×class="stub"3
4
-class="stub"6
4

=class="stub"3
4
×7+15×class="stub"3
4
-2×class="stub"3
4

=class="stub"3
4
×(7+15-2),
=class="stub"3
4
×20,
=15.

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