42-(18+9)
53-8×3
(88-56)÷8
①56-(26+24)
②(80-56)÷3
③6+30÷6
④48÷8×9
⑤18+28-16
⑥4×(28÷7)
①250-250÷25×2
②18÷ ×
③5.2÷0.4÷2.5
④(34- )÷17
⑤4.3×1.75-1.75+ ×6.7
⑥ ×[(72.8-69.6)÷ ]
①×4.5+6.5×80%﹣0.8
②4×0.8×25%×12.5
③[﹣(﹣)]÷
④2022×