67.9-45.07-3.4怎么计算
用简便方法计算下面各题.(1)0.45×9.67-4.67×0.45(2)37.68-6.44-3.56....
用简便方法计算下面各题.
(1)0.45×9.67-4.67×0.45
(2)37.68-6.44-3.56. 展开
(1)0.45×9.67-4.67×0.45
(2)37.68-6.44-3.56. 展开
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(1)0.45×9.67-4.67×0.45
=0.45×(9.67-4.67)
=0.45×5
=2.25;
(2)37.68-6.44-3.56
=37.68-(6.44+3.56)
=37.68-10
=27.68.
=0.45×(9.67-4.67)
=0.45×5
=2.25;
(2)37.68-6.44-3.56
=37.68-(6.44+3.56)
=37.68-10
=27.68.
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