题目内容
| 简便计算. 83+83×99 |
87×46-46×77 |
38×102. |
(1)83+83×99,
=83×(99+1),
=83×100,
=8300;
(2)87×46-46×77,
=(87-77)×46,
=10×46,
=460;
(3)38×102,
=38×(100+2),
=38×100+38×2,
=3800+76,
=3876.
=83×(99+1),
=83×100,
=8300;
(2)87×46-46×77,
=(87-77)×46,
=10×46,
=460;
(3)38×102,
=38×(100+2),
=38×100+38×2,
=3800+76,
=3876.
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