题目内容
脱式计算.
300-64×84÷28
4-1÷3-
×8
(2
+0.6÷
)×2.4
[1
-(
+0.35)÷1
]×3.2.
300-64×84÷28
4-1÷3-
| 1 |
| 3 |
(2
| 4 |
| 5 |
| 6 |
| 35 |
[1
| 1 |
| 8 |
| 13 |
| 20 |
| 1 |
| 7 |
(1)300-64×84÷28,
=300-5276÷28,
=300-192,
=108;
(2)4-1÷3-
×8,
=4-
-
,
=4-(
+
),
=4-3,
=1;
(3)(2
+0.6÷
)×2.4,
=(2
+
)×2.4,
=6.3×2.4,
=15.12;
(4)[1
-(
+0.35)÷1
]×3.2,
=[1
-1÷1
]×3.2,
=[1
-
]×3.2,
=
×3.2,
=0.8.
=300-5276÷28,
=300-192,
=108;
(2)4-1÷3-
| 1 |
| 3 |
=4-
| 1 |
| 3 |
| 8 |
| 3 |
=4-(
| 1 |
| 3 |
| 8 |
| 3 |
=4-3,
=1;
(3)(2
| 4 |
| 5 |
| 6 |
| 35 |
=(2
| 4 |
| 5 |
| 7 |
| 2 |
=6.3×2.4,
=15.12;
(4)[1
| 1 |
| 8 |
| 13 |
| 20 |
| 1 |
| 7 |
=[1
| 1 |
| 8 |
| 1 |
| 7 |
=[1
| 1 |
| 8 |
| 7 |
| 8 |
=
| 2 |
| 8 |
=0.8.
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