①﹣(+)
②8.89﹣1.84﹣3.16
③÷9+×
④12.5×0.32×2.5
①612÷18+780÷30
②2.5×32×12.5
③5÷(0.5+)×
④
⑤()
⑥16×+8×+12÷25
①700﹣1.5÷7×30
②14.1﹣4.63+1.6﹣2.37
③(+)×9+
④÷[×(﹣)]
①÷(3--)
②1.85×+1.15×-
③+1+6.625+
④5×(+)×4
⑤(16.4×75%﹣3.9)÷0.8
⑥3.28×+5.72÷□(在□里填上合适的数,使计算简便,并计算。)