题目内容
计算下面各题,能简便的用简便方法计算
| (241-41)÷25×4 | 83×29+71×83 | 199+199×99 |
| 560÷[490÷(34+36)] | 101×99 | 208×37-8×37. |
(1)(241-41)÷25×4,
=200÷25×4,
=8×4,
=32;
(2)83×29+71×83,
=83×(29+71),
=83×100,
=8300;
(3)199+199×99,
=199×(1+99),
=199×100,
=19900;
(4)560÷[490÷(34+36)],
=560÷[490÷70],
=560÷7,
=80;
(5)101×99,
=(100+1)×99,
=100×99+1×99,
=9900+99,
=9999;
(6)208×37-8×37,
=(208-8)×37,
=200×37,
=7400.
=200÷25×4,
=8×4,
=32;
(2)83×29+71×83,
=83×(29+71),
=83×100,
=8300;
(3)199+199×99,
=199×(1+99),
=199×100,
=19900;
(4)560÷[490÷(34+36)],
=560÷[490÷70],
=560÷7,
=80;
(5)101×99,
=(100+1)×99,
=100×99+1×99,
=9900+99,
=9999;
(6)208×37-8×37,
=(208-8)×37,
=200×37,
=7400.
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