312÷24×30 (340+128)÷78
160×26= 160×260=
32×26= 16×13=
①12.7﹣3.6﹣5.4
②
③
④
205+97= 3.01﹣0.1= 0.25×3×4= 36×25%=
3×a×a= ×1.6= 4÷25%= 16.4+3.06=
1﹣ ÷ = ( ﹣ )÷ =