①
②
③0.79×99+0.79
④3.8×97+0.38×30
⑤
⑥(﹣)×9×12
205+97= 3.01﹣0.1= 0.25×3×4= 36×25%=
3×a×a= ×1.6= 4÷25%= 16.4+3.06=
1﹣ ÷ = ( ﹣ )÷ =