题目内容
下面各题,能简算的要简算.
(1)30.1-16.8÷3.5×6.2
(2)27×99
(3)
×2.5×
×0.4
(4)
÷8+
×
(5)15×
×(
×
)
(6)
÷[(
-
)÷
].
(1)30.1-16.8÷3.5×6.2
(2)27×99
(3)
| 5 |
| 4 |
| 4 |
| 5 |
(4)
| 7 |
| 23 |
| 7 |
| 23 |
| 7 |
| 8 |
(5)15×
| 1 |
| 7 |
| 2 |
| 3 |
| 7 |
| 10 |
(6)
| 8 |
| 9 |
| 4 |
| 6 |
| 1 |
| 3 |
| 1 |
| 2 |
(1)30.1-16.8÷3.5×6.2,
=30.1-4.8×6.2,
=30.1-29.76,
=0.34;
(2)27×99,
=27×(100-1),
=27×100-27×1,
=2700-27,
=2673;
(3)
| 5 |
| 4 |
| 4 |
| 5 |
=(
| 5 |
| 4 |
| 4 |
| 5 |
=1×1,
=1;
(4)
| 7 |
| 23 |
| 7 |
| 23 |
| 7 |
| 8 |
=
| 7 |
| 23 |
| 1 |
| 8 |
| 7 |
| 23 |
| 7 |
| 8 |
=
| 7 |
| 23 |
| 1 |
| 8 |
| 7 |
| 8 |
=
| 7 |
| 23 |
=
| 7 |
| 23 |
(5)15×
| 1 |
| 7 |
| 2 |
| 3 |
| 7 |
| 10 |
=(15×
| 2 |
| 3 |
| 1 |
| 7 |
| 7 |
| 10 |
=10×
| 1 |
| 10 |
=1;
(6)
| 8 |
| 9 |
| 4 |
| 6 |
| 1 |
| 3 |
| 1 |
| 2 |
=
| 8 |
| 9 |
| 1 |
| 3 |
| 1 |
| 2 |
=
| 8 |
| 9 |
| 2 |
| 3 |
=
| 4 |
| 3 |
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