题目内容
1÷
| 7684×101-7684= | ||||||||
|
| ||||||||
9
| 31.6.25-40÷16×2= | ||||||||
| (1-0.75)×(3.9+2.25÷2.5)= | 2
| ||||||||
[(
|
(1)1÷
| 2 |
| 7 |
| 1 |
| 7 |
=
| 7 |
| 2 |
| 1 |
| 7 |
=
| 1 |
| 2 |
(2)7684×101-7684,
=7684×(101-1),
=7684×100,
=768400;
(3)
| 1 |
| 4 |
| 1 |
| 8 |
=1×
| 1 |
| 8 |
=
| 1 |
| 8 |
(4)
| 1 |
| 3 |
| 1 |
| 3 |
=(
| 1 |
| 3 |
| 1 |
| 3 |
=1×4,
=4;
(5)9
| 2 |
| 5 |
| 3 |
| 7 |
=9
| 2 |
| 5 |
| 3 |
| 7 |
=9-3
| 3 |
| 7 |
=5
| 4 |
| 7 |
(6)31.625-40÷16×2,
=31.625-2.5×2,
=31.625-5,
=26.625;
(7)(1-0.75)×(3.9+2.25÷2.5),
=0.25×(3.9+0.9),
=0.25×4.8,
=1.2;
(8)2
| 7 |
| 20 |
| 3 |
| 4 |
| 1 |
| 3 |
=2
| 7 |
| 20 |
| 3 |
| 4 |
| 8 |
| 15 |
=2
| 7 |
| 20 |
| 3 |
| 4 |
=2
| 7 |
| 20 |
| 7 |
| 20 |
=
| 47 |
| 67 |
(9)[(
| 37 |
| 40 |
| 3 |
| 25 |
| 17 |
| 24 |
| 2 |
| 15 |
=[1÷
| 3 |
| 25 |
| 17 |
| 24 |
| 2 |
| 15 |
=[
| 25 |
| 3 |
| 17 |
| 24 |
| 2 |
| 15 |
=5
| 5 |
| 8 |
| 2 |
| 15 |
=
| 3 |
| 4 |
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