题目内容
脱式计算,能简算的要简算.
(1)(
+
+
)÷
(2)[1-(
+
)×
]÷
(3)6.46-(5.37-3.54)
(4)5.58-
+5.42-
.
(1)(
| 5 |
| 6 |
| 7 |
| 12 |
| 3 |
| 8 |
| 1 |
| 48 |
(2)[1-(
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 5 |
| 5 |
| 6 |
(3)6.46-(5.37-3.54)
(4)5.58-
| 3 |
| 5 |
| 2 |
| 5 |
(1)(
+
+
)÷
,
=(
+
+
)×48,
=
×48+
×48+
×48,
=40+28+18,
=86;
(2)[1-(
+
)×
]÷
,
=[1-(
+
)×
]×
,
=[1-
×
]×
,
=[1-
]×
,
=
×
,
=1;
(3)6.46-(5.37-3.54),
=6.46-5.37+3.54,
=(6.46+3.54)-5.37,
=10-5.37,
=4.63;
(4)5.58-
+5.42-
,
=(5.58+5.42)-(
+
),
=11-1,
=10.
| 5 |
| 6 |
| 7 |
| 12 |
| 3 |
| 8 |
| 1 |
| 48 |
=(
| 5 |
| 6 |
| 7 |
| 12 |
| 3 |
| 8 |
=
| 5 |
| 6 |
| 7 |
| 12 |
| 3 |
| 8 |
=40+28+18,
=86;
(2)[1-(
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 5 |
| 5 |
| 6 |
=[1-(
| 3 |
| 6 |
| 2 |
| 6 |
| 1 |
| 5 |
| 6 |
| 5 |
=[1-
| 5 |
| 6 |
| 1 |
| 5 |
| 6 |
| 5 |
=[1-
| 1 |
| 6 |
| 6 |
| 5 |
=
| 5 |
| 6 |
| 6 |
| 5 |
=1;
(3)6.46-(5.37-3.54),
=6.46-5.37+3.54,
=(6.46+3.54)-5.37,
=10-5.37,
=4.63;
(4)5.58-
| 3 |
| 5 |
| 2 |
| 5 |
=(5.58+5.42)-(
| 3 |
| 5 |
| 2 |
| 5 |
=11-1,
=10.
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