Question

求这三道计算题，小学数学！谢谢！

Answer 1

第三道：[2/5+(3-2.7*8/9)/15%-(5+3/4)
=(2/5+3-3*9/10*8/9)/15%-(5+3/4)
=(2/5-3*8/10)/15%-(5+3/4)
=(2/5-12/5)/15%-(5+3/4)
=-5/10*(100/15)-(5+3/4)
=-10/3-5-3/4
=-(40+60+9)/12
=-109/12

Answer 2

1) =8000-2544 x (72/24)
=8000-2544 x 3
=8000-7632
=368

3) =[0.4+(3-2.4)] x 20/3-23/4
=20/3-23/4
=11/12

4) =10/[8/3 x 2.4-1.5 x 8/3]
=10/[6.4-4]
=10 x 5/12
=25/6

Answer 3

亲 你在逗我玩么 会做第二题 不会第一题 ？？？

追问

懒得算

Answer 4

第一个是368

Answer 5

(1) 8000-2544÷24×72
=8000-106×72
=8000-7632
=368