题目内容
| ①6.5×8+3.5×8-44 | ②907+907×9 | ③(999+111)÷[56×(
| ||||
| ④56×99 | ⑤168.1÷(4.3×2-0.4) | ⑥[2-(11.9-8.4×1
|
①6.5×8+3.5×8-44
=(6.5+3.5)×8-44
=10×8-44
=80-44
=36;
②907+907×9
=907×(1+9)
=907×10
=9070;
③(999+111)÷[56×(
-
)]
=1110÷[56×
]
=1110÷3
=370;
④56×99
=56×(100-1)
=56×100-56×1
=5600-56
=5544;
⑤168.1÷(4.3×2-0.4)
=168.1÷(8.6-0.4)
=168.1÷8.2
=20.5;
⑥[2-(11.9-8.4×1
)]÷1.3
=[2-(11.9-
×
)]÷1.3
=[2-(11.9-11.2)]÷1.3
=[2-0.7]÷1.3
=1.3÷1.3
=1.
=(6.5+3.5)×8-44
=10×8-44
=80-44
=36;
②907+907×9
=907×(1+9)
=907×10
=9070;
③(999+111)÷[56×(
| 3 |
| 7 |
| 3 |
| 8 |
=1110÷[56×
| 3 |
| 56 |
=1110÷3
=370;
④56×99
=56×(100-1)
=56×100-56×1
=5600-56
=5544;
⑤168.1÷(4.3×2-0.4)
=168.1÷(8.6-0.4)
=168.1÷8.2
=20.5;
⑥[2-(11.9-8.4×1
| 1 |
| 3 |
=[2-(11.9-
| 42 |
| 5 |
| 4 |
| 3 |
=[2-(11.9-11.2)]÷1.3
=[2-0.7]÷1.3
=1.3÷1.3
=1.
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