题目内容
脱式计算(能用简便方法计算的要用简便方法).
17.5-4.25-5.75
1.68÷(2.4×2-4.6)
÷[
-(
-
)].
17.5-4.25-5.75
1.68÷(2.4×2-4.6)
| 9 |
| 36 |
| 3 |
| 4 |
| 7 |
| 16 |
| 1 |
| 4 |
(1)17.5-4.25-5.75
=17.5-(4.25+5.75)
=17.5-10
=7.5;
(2)1.68÷(2.4×2-4.6)
=1.68÷(4.8-4.6)
=1.68÷0.2
=8.4;
(3)
÷[
-(
-
)]
=
÷[
-
]
=
÷
=
×
=
.
=17.5-(4.25+5.75)
=17.5-10
=7.5;
(2)1.68÷(2.4×2-4.6)
=1.68÷(4.8-4.6)
=1.68÷0.2
=8.4;
(3)
| 9 |
| 36 |
| 3 |
| 4 |
| 7 |
| 16 |
| 1 |
| 4 |
=
| 9 |
| 36 |
| 3 |
| 4 |
| 3 |
| 16 |
=
| 9 |
| 36 |
| 9 |
| 16 |
=
| 9 |
| 36 |
| 16 |
| 9 |
=
| 4 |
| 9 |
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