(300-130)×6 6×72+605
63 + (53 - 27) 105× 5 - 223 625 + 45 ÷ 5
700-(263+278) (491-483)×6
412+8×9 (554-505)÷7
9×8+147 302-6×7 (521-465)÷8
800-124×6 732÷ (74-68) 58×7+485
①200-74+ 157
②55+45×6
③256-26×6
④100-48÷6
⑤5×(120-80)
⑥45÷(35÷7)
30×4+98 (352-289)÷7 70×9-120
综合算式;