题目内容
脱式计算.(能简算的要简算)
(50-40×1.2)÷0.5
8×4×125×25
18.8-
-3.8-
32×71.1+28.9×32.
(50-40×1.2)÷0.5
8×4×125×25
18.8-
| 2 |
| 3 |
| 1 |
| 3 |
32×71.1+28.9×32.
①(50-40×1.2)÷0.5
=(50-48)÷0.5
=2÷0.5
=4;
②8×4×125×25
=(8×125)×(4×25)
=1000×100
=100000;
③18.8-
-3.8-
=(18.8-3.8)-(
+
)
=15-1
=14;
④32×71.1+28.9×32
=32×(71.1+28.9)
=32×100
=3200.
=(50-48)÷0.5
=2÷0.5
=4;
②8×4×125×25
=(8×125)×(4×25)
=1000×100
=100000;
③18.8-
| 2 |
| 3 |
| 1 |
| 3 |
=(18.8-3.8)-(
| 2 |
| 3 |
| 1 |
| 3 |
=15-1
=14;
④32×71.1+28.9×32
=32×(71.1+28.9)
=32×100
=3200.
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