285-74-26 65×142-42×65 3000÷125÷8
199+298+499+4 125×32×25 49×99+49
①4.29﹣0.24+3.71﹣0.76
②450×[356﹣(297+56)]
③666×222+444×667
80×3.9×1.25 15.2×9.9+1.52
3.9×8.6+3.9×1.4 4.8×3.5-10.9
①3.6﹣2.8+7.4﹣7.2
②1.25×1.6×25
③÷4
④÷[(﹣)×]
①×4.5+6.5×80%﹣0.8
②4×0.8×25%×12.5
③[﹣(﹣)]÷
④2022×