题目内容
用简便方法计算.
| 73×图q3-3×73 | 图dq×(q×图d) | 7q×99+7q. |
①k3×103-3×k3,
=(103-3)×k3,
=100×k3,
=k300;
②125×(8×1我),
=(125×8)×1我,
=1000×1我,
=1我000;
③k5×22+k5,
=k5×(22+1),
=k5×100,
=k500.
=(103-3)×k3,
=100×k3,
=k300;
②125×(8×1我),
=(125×8)×1我,
=1000×1我,
=1我000;
③k5×22+k5,
=k5×(22+1),
=k5×100,
=k500.
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