计算下面各题,能简算的要简算.48×(56+58-512)1.25×3.2×0.257-7×37+4735×(1-37)÷512817÷19+119×91723+13×34.-数学

题目简介

计算下面各题,能简算的要简算.48×(56+58-512)1.25×3.2×0.257-7×37+4735×(1-37)÷512817÷19+119×91723+13×34.-数学

题目详情

计算下面各题,能简算的要简算.
48×(
5
6
+
5
8
-
5
12
)1.25×3.2×0.257-7×
3
7
+
4
7


35×(1-
3
7
)÷
5
12
8
17
÷19+
1
19
×
9
17
2
3
+
1
3
×
3
4
题型:解答题难度:中档来源:不详

答案

(1)48×(class="stub"5
6
+class="stub"5
8
-class="stub"5
12
),
=48×class="stub"5
6
+48×class="stub"5
8
-48×class="stub"5
12

=40+30-20,
=50;

(2)1.25×3.2×0.25,
=1.25×0.8×(4×0.25),
=1×1,
=1;

(3)7-7×class="stub"3
7
+class="stub"4
7

=7-3+class="stub"4
7

=4+class="stub"4
7

=4class="stub"4
7


(4)35×(1-class="stub"3
7
)÷class="stub"5
12

=35×class="stub"4
7
×class="stub"12
5

=48;

(5)class="stub"8
17
÷19+class="stub"1
19
×class="stub"9
17

=class="stub"8
17
class="stub"1
19
+class="stub"1
19
×class="stub"9
17

=(class="stub"8
17
+class="stub"9
17
)×class="stub"1
19

=class="stub"1
19


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

=class="stub"2
3
+class="stub"1
4

=class="stub"11
12

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