12.5×0.8= 6.3÷0.09= 1.98-0.8= 5.63+1.37=
0.6-0.6×0.5= 57÷1.9= 44÷1.1= 0.42=
10-4.06= 0.78×0.3÷0.78×0.3=
7.5÷0.37.5 6÷1.26 4.2÷3÷24.2÷6
①612÷18+780÷30
②2.5×32×12.5
③5÷(0.5+)×
④
⑤()
⑥16×+8×+12÷25