
下面各题怎样算简便就怎样算(56+712+38)÷148 &...
下面各题怎样算简便就怎样算(56+712+38)÷14857×16-2÷75[6.85-(0.65+0.7)]÷2.545×(79+415-0.6)...
下面各题怎样算简便就怎样算(56+712+38)÷148 57×16-2÷75[6.85-(0.65+0.7)]÷2.5 45×(79+415-0.6)
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(1)(
+
+
)÷
=
×48+
×48+
×48
=40+28+18
=86;
(2)
×16-2÷
=
×(16-2)
=
×14
=10;
(3)[6.85-(0.65+0.7)]÷2.5
=[6.85-1.35]÷2.5
=5.5÷2.5
=2.2;
(4)45×(
+
-0.6)
=45×
+45×
-45×0.6
=35+12-27
=20.
5 |
6 |
7 |
12 |
3 |
8 |
1 |
48 |
=
5 |
6 |
7 |
12 |
3 |
8 |
=40+28+18
=86;
(2)
5 |
7 |
7 |
5 |
=
5 |
7 |
=
5 |
7 |
=10;
(3)[6.85-(0.65+0.7)]÷2.5
=[6.85-1.35]÷2.5
=5.5÷2.5
=2.2;
(4)45×(
7 |
9 |
4 |
15 |
=45×
7 |
9 |
4 |
15 |
=35+12-27
=20.
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