计算.(1)3.6-[(7.5-5.7)×0.2](2)9÷(12-14+18)-3×7(3)123×(12-13)÷16×3(4)[845-(0.6+2910)×47]÷1.7.-数学

题目简介

计算.(1)3.6-[(7.5-5.7)×0.2](2)9÷(12-14+18)-3×7(3)123×(12-13)÷16×3(4)[845-(0.6+2910)×47]÷1.7.-数学

题目详情

计算.
(1)3.6-[(7.5-5.7)×0.2]
(2)9÷(
1
2
-
1
4
+
1
8
)-3×7

(3)1
2
3
×(
1
2
-
1
3
1
6
×3
             
(4)[8
4
5
-(0.6+2
9
10
4
7
]÷1.7
题型:解答题难度:中档来源:不详

答案

(1)3.6-[(7.5-5.7)×0.2],
=3.6-[1.8×0.2],
=3.6-0.36,
=3.24;

(2)9÷(class="stub"1
2
-class="stub"1
4
+class="stub"1
8
)-3×7

=9÷class="stub"3
8
-3×7,
=24-21,
=3;

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

=class="stub"5
3
×class="stub"1
6
÷class="stub"1
6
×3,
=(class="stub"5
3
×3)×(class="stub"1
6
÷class="stub"1
6
),
=5×1,
=5;

(4)[8class="stub"4
5
-(0.6+2class="stub"9
10
)×class="stub"4
7
]÷1.7

=[8class="stub"4
5
-3.5×class="stub"4
7
]÷1.7

=[8class="stub"4
5
-2]÷1.7

=6.8÷1.7,
=4.

更多内容推荐