题目内容
列式计算下面各题.
×
÷
28÷
×
×
×(2009×42×85)
| 7 |
| 8 |
| 4 |
| 15 |
| 21 |
| 30 |
28÷
| 4 |
| 7 |
| 8 |
| 7 |
| 1 |
| 21 |
| 1 |
| 17 |
(1)
×
÷
,
=
×
×
,
=
;
(2)28÷
×
,
=28×
×
,
=56;
(3)
×
×(2009×42×85),
=(
×42)×(
×85)×2009,
=2×5×2009,
=20090.
| 7 |
| 8 |
| 4 |
| 15 |
| 21 |
| 30 |
=
| 7 |
| 8 |
| 4 |
| 15 |
| 30 |
| 21 |
=
| 1 |
| 3 |
(2)28÷
| 4 |
| 7 |
| 8 |
| 7 |
=28×
| 7 |
| 4 |
| 8 |
| 7 |
=56;
(3)
| 1 |
| 21 |
| 1 |
| 17 |
=(
| 1 |
| 21 |
| 1 |
| 17 |
=2×5×2009,
=20090.
练习册系列答案
相关题目