①1- -
② + -
③ + + +
④0.75× ×
⑤( + - )÷
⑥ × ÷ ×
(1--)÷ ×× ×+×
= = =
5÷0.02= 37.6-25.8= 234÷3= 45×7%=
2.4×2.5= ×5.6= ÷ = + =