①99×57
②17.96-4.04-7.96
③25×16×125
④44+4.8+156+5.2
⑤7.5×12.5-25×0.75
⑥36×[480÷(93-69)]
①28×57+43×28
②201×32
③225×15×4
④630÷45
⑤222-56-44
⑥63+54+37+46