①180-60÷12×24
②18-
③1.25×3.2×250
④
⑤24×()
⑥
3.56×[1÷(2.1﹣2.09)]
( + ﹣ )×36
0.875×25+75×87.5%
÷ + ÷
①3.78+2.91+6.22
②125×16
③
12.8+4.5×3.6
15.5﹣(5.45﹣2.38)
45.5÷2.5÷4
验算
9.9×5.9 60 1