题目内容
脱式计算.
| 240×3÷6 | 120+19×5 | 312×(300-290) |
240×3÷6,
=720÷6,
=120;
120+19×5,
=120+95,
=215;
312×(300-290)
=312×10,
=3120.
=720÷6,
=120;
120+19×5,
=120+95,
=215;
312×(300-290)
=312×10,
=3120.
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