63×0.625+16×+62.5% 4.66-(2.66+25%)- ×14×17
275+399=
20×35=
13.7-7=
1+15%= 1÷50%= 37.5%+ = 6- = 0.77+0.33= 16×2.5=
+ = ÷ = 1.25×0.8= :5= 7÷1.4= 9+ =
①( - )×( + )
②( + )×24×
③( - )÷ ×5
④27× +136× +90×
⑤ ×[ -( - )]
⑥57× +