题目内容
计算:
(1)[2
-(8.5-2
)÷3.5]×7
(2)[47-(18.75-1÷
)×2
]÷0.46.
(1)[2
| 1 |
| 7 |
| 1 |
| 8 |
| 5 |
| 12 |
(2)[47-(18.75-1÷
| 24 |
| 31 |
| 5 |
| 37 |
(1)[2
-(8.5-2
)÷3.5]×7
,
=[2
-(8
-2
)÷
]×7
,
=(
-
×
)×
,
=(
-
)×
,
=
×
,
=2
;
(2)[47-(18.75-1÷
)×2
]÷0.46,
=[47-(18
-1×
)×2
]÷
,
=[47-(
-
)×
]×
,
=(47-
×
)×
,
=(47-
)×
,
=
×
,
=
,
=21
.
| 1 |
| 7 |
| 1 |
| 8 |
| 5 |
| 12 |
=[2
| 1 |
| 7 |
| 1 |
| 2 |
| 1 |
| 8 |
| 7 |
| 2 |
| 5 |
| 12 |
=(
| 15 |
| 7 |
| 51 |
| 8 |
| 2 |
| 7 |
| 89 |
| 12 |
=(
| 60 |
| 28 |
| 51 |
| 28 |
| 89 |
| 12 |
=
| 9 |
| 28 |
| 89 |
| 12 |
=2
| 43 |
| 112 |
(2)[47-(18.75-1÷
| 24 |
| 31 |
| 5 |
| 37 |
=[47-(18
| 3 |
| 4 |
| 31 |
| 24 |
| 5 |
| 37 |
| 23 |
| 50 |
=[47-(
| 75 |
| 4 |
| 31 |
| 24 |
| 79 |
| 37 |
| 50 |
| 23 |
=(47-
| 419 |
| 24 |
| 79 |
| 37 |
| 50 |
| 23 |
=(47-
| 33101 |
| 888 |
| 50 |
| 23 |
=
| 8635 |
| 888 |
| 50 |
| 23 |
=
| 215875 |
| 10212 |
=21
| 1423 |
| 10212 |
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