简便运算 ( 2 5 + 1 6 - 4 15 )÷ 1 30 96×1012.7×99+2.7×2-2.7.
(1)(
=
=12+5-8, =9; (2)96×101, =96×100+96, =9600+96, =9696; (3)2.7×99+2.7×2-2.7, =2.7×(99+2-1), =2.7×100, =270. |
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简便运算 ( 2 5 + 1 6 - 4 15 )÷ 1 30 96×1012.7×99+2.7×2-2.7.
(1)(
=
=12+5-8, =9; (2)96×101, =96×100+96, =9600+96, =9696; (3)2.7×99+2.7×2-2.7, =2.7×(99+2-1), =2.7×100, =270. |
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