题目内容
| 脱式计算,能简算的要简算. 496-23×16 | 4.2-1.38+5.8-3.62 |
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| 43×99 |
|
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(1)496-23×16,
=496-368,
=128;
(2)43×99,
=43×(100-1),
=43×100-43,
=4300-43,
=4257;
(3)4.2-1.38+5.8-3.62,
=496-368,
=128;
(2)43×99,
=43×(100-1),
=43×100-43,
=4300-43,
=4257;
(3)4.2-1.38+5.8-3.62,
| =(4.2+5.8)-(1.38+3.62), =10-5, =5; (4)
=
=
=
(5)
=
=(23+15)×
=14; (6)
=1-
=1-
=
|
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