+ = 1- = 1.25× = - =
0.9+99×0.9= 0÷ = 1÷ = -0.5=
0.6×101= 3.2×2.5×12.5=
40×18﹣60÷15
(12.5×8﹣60)÷0.4
3.14×2.77+0.223×31.4
1﹣+= 1÷×= 0.5﹣+0.5﹣=
8.1+= (+)×24= 7××7÷=
1.43+0.2×0.5+1.57
÷[×(+)]
(÷﹣÷7)÷
÷[×(﹣)]
①5.58﹣ +5.42﹣
② ×2.5× ×0.4
③
④
⑤
⑥
( ﹣ )×18
÷ ÷
2.6× +2.4÷
1﹣ ÷( + )