
计算下面各题,能简算的要简算)9.2÷25%+0.4×8 &...
计算下面各题,能简算的要简算)9.2÷25%+0.4×8178÷(178-34)1-12-16-112-120-130(3.47+3.47÷13)×2.5....
计算下面各题,能简算的要简算)9.2÷25%+0.4×8 178÷(178-34)1-12-16-112-120-130(3.47+3.47÷13)×2.5.
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(1)9.2÷25%+0.4×8
=36.8+3.2
=40;
(2)1
÷(1
-
)
=
×
=
;
(3)1-
-
-
-
-
=1-
-(
-
)-(
-
)-(
-
)-(
-
)
=1-
-
+
-
+
-
+
-
+
=
;
(4)(3.47+3.47÷
)×2.5
=(3.47+3.47×3)×2.5
=3.47×4×2.5
=3.47×(4×2.5)
=3.47×10
=34.7.
=36.8+3.2
=40;
(2)1
7 |
8 |
7 |
8 |
3 |
4 |
=
15 |
8 |
8 |
9 |
=
5 |
3 |
(3)1-
1 |
2 |
1 |
6 |
1 |
12 |
1 |
20 |
1 |
30 |
=1-
1 |
2 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
4 |
1 |
5 |
1 |
5 |
1 |
6 |
=1-
1 |
2 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
4 |
1 |
5 |
1 |
5 |
1 |
6 |
=
1 |
6 |
(4)(3.47+3.47÷
1 |
3 |
=(3.47+3.47×3)×2.5
=3.47×4×2.5
=3.47×(4×2.5)
=3.47×10
=34.7.
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