①-+-
②×+÷
③(6﹣1.3×4)÷0.1
④0.4×0.25×8×125
⑤3.4÷[(1.25+0.45)×23]
72×0.03+0.3×2.8 ÷+× 4.5÷÷
×48 -(4.375-) ÷(-0.375-)
①-÷-
②×+÷8
③(×27-)×
④÷[(+)×]
改正:
①101×32
②2.74+8.67+7.26+11.33
③18.8﹣5.8﹣﹣4.2﹣
④×+÷
⑤0.888×125×73+999×3
⑥4﹣[3.75×(1.2﹣)+]
①273﹣73﹣27
②1.25×9.78×80
③()×24
④[1﹣()]÷
①6.4×2.5×1.25
②8.5×98%
③÷4+×
④×