题目内容
24×(
|
|
| ||||||||||||||
|
|
|
(1)24×(
+
)
=24×
+24×
=20+10
=30;
(2)
×12×
=
×
×12
=
×12
=6;
(3)
×99+
=
×(99+1)
=
×100
=62.5;
(4)
×87
=
×(86+1)
=
×86+
×1
=85
;
(5)
×
×87
=
×87×
=
;
(6)
×
+
×
=
×(
+
)
=
×1
=
.
| 5 |
| 6 |
| 5 |
| 12 |
=24×
| 5 |
| 6 |
| 5 |
| 12 |
=20+10
=30;
(2)
| 3 |
| 5 |
| 5 |
| 6 |
=
| 3 |
| 5 |
| 5 |
| 6 |
=
| 1 |
| 2 |
=6;
(3)
| 5 |
| 8 |
| 5 |
| 8 |
=
| 5 |
| 8 |
=
| 5 |
| 8 |
=62.5;
(4)
| 85 |
| 86 |
=
| 85 |
| 86 |
=
| 85 |
| 86 |
| 85 |
| 86 |
=85
| 85 |
| 86 |
(5)
| 1 |
| 87 |
| 2 |
| 19 |
=
| 1 |
| 87 |
| 2 |
| 19 |
=
| 2 |
| 19 |
(6)
| 5 |
| 8 |
| 1 |
| 3 |
| 5 |
| 8 |
| 2 |
| 3 |
=
| 5 |
| 8 |
| 1 |
| 3 |
| 2 |
| 3 |
=
| 5 |
| 8 |
=
| 5 |
| 8 |
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