作业帮490＊99＊489／490
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/30 06:00:16
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490＊99＊489／490
490＊99＊489／490
490＊99＊489／490
490×99×489÷490
＝490÷490×99×489
＝1×99×489
＝（100－1）×489
＝100×489－1×489
＝48900－489
＝48411
490×99×489÷490
=490÷490×99×489-------->带着运算符号搬家
=1×99×489
=99×489
=（100-1）×489-------->利用乘法分配律
=100×489-1×489-------->千万别把-1×489写成-1哦
=48900-489
=48411
490＊99＊489／490
请问,490乘99又490分之489 简便运算
490乘99又490分之489怎么做
490乘99又490份之489怎么做
490*99又470分之489列式计算
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