①78×101-78
②32.76-(2.76+8.5)
③5×38×4×5
④2.5×36
⑤7.89+0.32+0.68
⑥185×48+15×48
①8.8×12.5
②78×10.1
③6.8×4+13.2×4
④15.8÷(15.8×4)
⑤75.7×3.3-45.7×3.3
⑥42.82+5.4+0.18