①
②
③
④
⑤
⑥
x-x=
x+60%x=3.84
x ÷=
5÷(1+)= 4×0.5= 0.75×= 1﹣1×=
+×= 24÷= ×0.25= +=
10﹣= 1﹣×= ×6÷×6= 1÷×=
--+ 87× ×()
÷5+5÷ ××28×45 ÷(×)
24×()
②3.7×+13÷
④7÷(+0.875)
⑤22×+25×75%-6×0.75-
⑥37×