题目内容
[(1
×2+2.5)÷
-2
]÷1.6
[(5
-4.25)×
]÷
+33÷
[(9
-3.2)÷2
]×[1÷(2.1-2
)]
9.75+99.75+999.75+9999.75
1
-[(3.62×
+6.38÷7
)×1.82-1
×0.82]
.
| 2 |
| 3 |
| 7 |
| 8 |
| 1 |
| 5 |
[(5
| 1 |
| 4 |
| 5 |
| 8 |
| 3 |
| 8 |
| 11 |
| 6 |
[(9
| 1 |
| 5 |
| 1 |
| 2 |
| 9 |
| 100 |
9.75+99.75+999.75+9999.75
1
| 2 |
| 3 |
| 2 |
| 15 |
| 1 |
| 2 |
| 1 |
| 3 |
2890+
| ||||||
|
①[(1
×2+2.5)÷
-2
]÷1.6,
=[(
+
)×
-
]÷1.6,
=[(
+
)×
-
]×
,
=[
×
-
]×
,
=[
-
]×
,
=[
-
]×
,
=
×
,
=
,
=2
;
②[(5
-4.25)×
]÷
+33÷
,
=
×
+33×
,
=
+18,
=19
;
③[(9
-3.2)÷2
]×[1÷(2.1-2
)],
=[6×
]×[1÷
],
=
×100,
=240;
④9.75+99.75+999.75+9999.75
=(9+1)+(99+1)+(999+1)+(9999+1)-4+0.75×4,
=10+100+1000+10000-4+3,
=11110-1,
=11109;
⑤1
-[(3.62×
+6.38÷7
)×1.82-1
×0.82],
=1
-[(3.62×
+6.38×
)×1.82-
×0.82],
=1
-[
×(3.62+6.38)×1.82-
×0.82],
=1
-[
×(1.82-0.82)],
=1
-
,
=
;
⑥
,
=(2890+
+
+
)÷(
+
+
),
=(2890+
)×
,
=2890×
+
×
,
=1200+1,
=1201.
| 2 |
| 3 |
| 7 |
| 8 |
| 1 |
| 5 |
=[(
| 10 |
| 3 |
| 15 |
| 6 |
| 8 |
| 7 |
| 11 |
| 5 |
=[(
| 20 |
| 6 |
| 15 |
| 6 |
| 8 |
| 7 |
| 11 |
| 5 |
| 5 |
| 8 |
=[
| 35 |
| 6 |
| 8 |
| 7 |
| 11 |
| 5 |
| 5 |
| 8 |
=[
| 20 |
| 3 |
| 11 |
| 5 |
| 5 |
| 8 |
=[
| 100 |
| 15 |
| 33 |
| 15 |
| 5 |
| 8 |
=
| 67 |
| 15 |
| 5 |
| 8 |
=
| 67 |
| 24 |
=2
| 19 |
| 24 |
②[(5
| 1 |
| 4 |
| 5 |
| 8 |
| 3 |
| 8 |
| 11 |
| 6 |
=
| 5 |
| 8 |
| 8 |
| 3 |
| 6 |
| 11 |
=
| 5 |
| 3 |
=19
| 2 |
| 3 |
③[(9
| 1 |
| 5 |
| 1 |
| 2 |
| 9 |
| 100 |
=[6×
| 2 |
| 5 |
| 1 |
| 100 |
=
| 12 |
| 5 |
=240;
④9.75+99.75+999.75+9999.75
=(9+1)+(99+1)+(999+1)+(9999+1)-4+0.75×4,
=10+100+1000+10000-4+3,
=11110-1,
=11109;
⑤1
| 2 |
| 3 |
| 2 |
| 15 |
| 1 |
| 2 |
| 1 |
| 3 |
=1
| 2 |
| 3 |
| 2 |
| 15 |
| 2 |
| 15 |
| 4 |
| 3 |
=1
| 2 |
| 3 |
| 2 |
| 15 |
| 4 |
| 3 |
=1
| 2 |
| 3 |
| 4 |
| 3 |
=1
| 2 |
| 3 |
| 4 |
| 3 |
=
| 1 |
| 3 |
⑥
2890+
| ||||||
|
=(2890+
| 100 |
| 120 |
| 105 |
| 120 |
| 84 |
| 120 |
| 100 |
| 120 |
| 105 |
| 120 |
| 84 |
| 120 |
=(2890+
| 289 |
| 120 |
| 120 |
| 289 |
=2890×
| 120 |
| 289 |
| 289 |
| 120 |
| 120 |
| 289 |
=1200+1,
=1201.
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