计算:(1)(14×65+12)÷45(2)2÷[(12+13)×25](3)40%x+16=80.-数学

题目简介

计算:(1)(14×65+12)÷45(2)2÷[(12+13)×25](3)40%x+16=80.-数学

题目详情

计算:
(1)(
1
4
×
6
5
+
1
2
)÷
4
5
(2)2÷[(
1
2
+
1
3
)×
2
5
]
(3)40%x+16=80.
题型:解答题难度:中档来源:不详

答案

(1)(class="stub"1
4
×class="stub"6
5
+class="stub"1
2
)÷class="stub"4
5

=(class="stub"3
10
+class="stub"1
2
)÷class="stub"4
5

=class="stub"4
5
×class="stub"5
4

=1;

(2)2÷[(class="stub"1
2
+class="stub"1
3
)×class="stub"2
5
]
=2÷[class="stub"5
6
×class="stub"2
5
]
=2÷class="stub"1
3

=2×3
=6;

(3)40%x+16=80
40%x+16-16=80-16
40%x÷40%=64÷40%
x=160.

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