计算:415+35×7923×14×3(81+37)×792-79+2×79119×385×18.-数学

题目简介

计算:415+35×7923×14×3(81+37)×792-79+2×79119×385×18.-数学

题目详情

计算:
4
15
+
3
5
×
7
9
2
3
×
1
4
×3
(81+
3
7
)×
7
9
2-
7
9
+2×
7
9
1
1
9
×
3
85
×18.
题型:解答题难度:中档来源:不详

答案

(1)class="stub"4
15
+class="stub"3
5
×class="stub"7
9

=class="stub"4
15
+class="stub"7
15

=class="stub"11
15


(2)class="stub"2
3
×class="stub"1
4
×3,
=(class="stub"2
3
×3)×class="stub"1
4

=2×class="stub"1
4

=class="stub"1
2


(3)(81+class="stub"3
7
)×class="stub"7
9

=81×class="stub"7
9
+class="stub"3
7
×class="stub"7
9

=63+class="stub"1
3

=63class="stub"1
3


(4)2-class="stub"7
9
+2×class="stub"7
9

=2+(2×class="stub"7
9
-class="stub"7
9
),
=2+class="stub"7
9

=2class="stub"7
9


(5)1class="stub"1
9
×class="stub"3
85
×18,
=(class="stub"10
9
×18)×class="stub"3
85

=20×class="stub"3
85

=class="stub"12
17

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