题目内容
计算下列各题.
×
×
×
×
×4×
.
| 2 |
| 5 |
| 4 |
| 7 |
| 21 |
| 10 |
| 3 |
| 4 |
| 8 |
| 15 |
| 10 |
| 13 |
| 16 |
| 9 |
| 3 |
| 4 |
(1)
×
×
=
×(
×
)
=
×
=
;
(2)
×
×
=
×
=
;
(3)
×4×
=
×(4×
)
=
×3
=5
.
| 2 |
| 5 |
| 4 |
| 7 |
| 21 |
| 10 |
=
| 2 |
| 5 |
| 4 |
| 7 |
| 21 |
| 10 |
=
| 2 |
| 5 |
| 6 |
| 5 |
=
| 12 |
| 25 |
(2)
| 3 |
| 4 |
| 8 |
| 15 |
| 10 |
| 13 |
=
| 2 |
| 5 |
| 10 |
| 13 |
=
| 4 |
| 13 |
(3)
| 16 |
| 9 |
| 3 |
| 4 |
=
| 16 |
| 9 |
| 3 |
| 4 |
=
| 16 |
| 9 |
=5
| 1 |
| 3 |
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