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(2013•黄冈模拟)正确、合理、灵活的计算下面各题.①(1.75×0.2+1.75×0.8)÷17.5②1014-(614-215)③243×814+75.7×82.5④38×114+125%+0.625×1.25⑤0.91÷45+1.25×10.9⑥(56+78-512)÷124.
题目详情
(2013•黄冈模拟)正确、合理、灵活的计算下面各题.
①(1.75×0.2+1.75×0.8)÷17.5
②10
-(6
-2
)
③243×8
+75.7×82.5
④
×1
+125%+0.625×1.25
⑤0.91÷
+1.25×10.9
⑥(
+
-
)÷
.
①(1.75×0.2+1.75×0.8)÷17.5
②10
1 |
4 |
1 |
4 |
1 |
5 |
③243×8
1 |
4 |
④
3 |
8 |
1 |
4 |
⑤0.91÷
4 |
5 |
⑥(
5 |
6 |
7 |
8 |
5 |
12 |
1 |
24 |
▼优质解答
答案和解析
(1)(1.75×0.2+1.75×0.8)÷17.5,
=1.75×(0.2+0.8)÷17.5,
=1.75×1÷17.5,
=1.75÷17.5,
=0.1;
(2)10
-(6
-2
),
=10
-6
+2
,
=4+2
,
=6
;
(3)243×8
+75.7×82.5,
=(24.3+75.7)×82.5,
=100×82.5,
=8250;
(4)
×1
+125%+0.625×1.25,
=1.25×(
+1+0.625),
=1.25×2,
=2.5;
(5)0.91÷
+1.25×10.9,
=1.25×(0.91+10.9),
=1.25×11.81,
=14.7625;
(6)(
+
-
)÷
,
=
×24+
×24-
×24,
=20+21-10,
=31.
=1.75×(0.2+0.8)÷17.5,
=1.75×1÷17.5,
=1.75÷17.5,
=0.1;
(2)10
1 |
4 |
1 |
4 |
1 |
5 |
=10
1 |
4 |
1 |
4 |
1 |
5 |
=4+2
1 |
5 |
=6
1 |
5 |
(3)243×8
1 |
4 |
=(24.3+75.7)×82.5,
=100×82.5,
=8250;
(4)
3 |
8 |
1 |
4 |
=1.25×(
3 |
8 |
=1.25×2,
=2.5;
(5)0.91÷
4 |
5 |
=1.25×(0.91+10.9),
=1.25×11.81,
=14.7625;
(6)(
5 |
6 |
7 |
8 |
5 |
12 |
1 |
24 |
=
5 |
6 |
7 |
8 |
5 |
12 |
=20+21-10,
=31.
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