脱式计算．①8.48-2.61-1.39 ②2.25×4.8+77.5×0.48 &n...
脱式计算．①8.48-2.61-1.39②2.25×4.8+77.5×0.48③38-310×56④〔1-（12+13）〕×36⑤5.4÷18+12⑥35÷（65÷37）...
脱式计算．①8.48-2.61-1.39 ②2.25×4.8+77.5×0.48 ③38-310×56④〔1-（12+13）〕×36 ⑤5.4÷18+12 ⑥35÷（65÷37）
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①8.48-2.61-1.39
=8.48-（2.61+1.39）
=8.48-4
=4.48
②2.25×4.8+77.5×0.48
=22.5×0.48+77.5×0.48
=（22.5+77.5）×0.48
=100×0.48
=48
③
-
×
=
-
=
?
=
④〔1-（
+
）〕×36
=[1-
]×36
=6
⑤5.4÷18+12
=0.3+12
=12.3
⑥35÷（
÷
）
=35÷
=35×
=12.5
=8.48-（2.61+1.39）
=8.48-4
=4.48
②2.25×4.8+77.5×0.48
=22.5×0.48+77.5×0.48
=（22.5+77.5）×0.48
=100×0.48
=48
③
| 3 |
| 8 |
| 3 |
| 10 |
| 5 |
| 6 |
=
| 3 |
| 8 |
| 1 |
| 4 |
=
| 3 |
| 8 |
| 2 |
| 8 |
=
| 1 |
| 8 |
④〔1-（
| 1 |
| 2 |
| 1 |
| 3 |
=[1-
| 5 |
| 6 |
=6
⑤5.4÷18+12
=0.3+12
=12.3
⑥35÷（
| 6 |
| 5 |
| 3 |
| 7 |
=35÷
| 14 |
| 5 |
=35×
| 5 |
| 14 |
=12.5
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