题目内容
用简便方法计算.
| 125×16 | 242+84+(58+116) | 35+71+29+65. |
①125×16,
=125×8×2,
=1000×2,
=2000;
②242+84+(58+116),
=(242+58)+(84+116),
=300+200,
=500;
③35+71+29+65,
=(35+65)+(71+29),
=100+100,
=200.
=125×8×2,
=1000×2,
=2000;
②242+84+(58+116),
=(242+58)+(84+116),
=300+200,
=500;
③35+71+29+65,
=(35+65)+(71+29),
=100+100,
=200.
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