题目内容
下面各题,怎样算简便就怎样算.
2007+2007×99
1.5×[0.02÷(2.1-2.09)]
×125×
×8
21×
+48×12.5%+11×
.
2007+2007×99
1.5×[0.02÷(2.1-2.09)]
| 1 |
| 4 |
| 1 |
| 125 |
21×
| 1 |
| 8 |
| 1 |
| 8 |
(1)2007+2007×99,
=2007×(1+99),
=2007×100,
=200700;
(2)1.5×[0.02÷(2.1-2.09)],
=1.5×[0.02÷0.01],
=1.5×2,
=3;
(3)
×125×
×8,
=(
×8)×(125×
),
=2×1,
=2;
(4)21×
+48×12.5%+11×
,
=
×(21+48+11),
=
×80,
=10.
=2007×(1+99),
=2007×100,
=200700;
(2)1.5×[0.02÷(2.1-2.09)],
=1.5×[0.02÷0.01],
=1.5×2,
=3;
(3)
| 1 |
| 4 |
| 1 |
| 125 |
=(
| 1 |
| 4 |
| 1 |
| 125 |
=2×1,
=2;
(4)21×
| 1 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 8 |
=
| 1 |
| 8 |
=10.
练习册系列答案
相关题目