①
②
③
④
⑤
25:7=x:35 6:x= 4:=12:x
×5= ÷ = ÷8=
0÷ = × = ×1.5=
① × ×3
②87×
③ - ×
④ ÷ ×
⑤3.7× +1.3÷
⑥ ÷(3- - )
③0.79×99+0.79
④3.8×97+0.38×30
⑥(﹣)×9×12