Question

请问这几题简便运算怎么写？谢谢！急！在线等！

请问这几题简便运算怎么写？谢谢！急！在线等！图片

Answer 1

【您的采纳是我答题的动力】

Answer 2

285
312
468
告诉你3个的了。不好好学习

Answer 3

照片

Answer 4

采纳

Answer 5

1. 98×428+572×98

   =98×(428+572)

   =98×1000

   =98000

2. 25×32×125

   =32×25×(100+20+5)

   =32×(2500+500+125)

   =32×3125

   =100000

3. 38.6-12.6-7.4

   =38.6-(12.6+7.4)

   =38.6-20

   =18.6

4. 2.57+4.68+1.32

   =2.57+6

   =8.57

5. 3000÷125÷8

   =3000÷(125×8)

   =3000÷1000

   =3

6. 99×85

   =(100-1)×85

   =8500-85

   =8415