①
②
③
④
⑤
⑥
10×20%=
×=
20÷10%=
÷3=
÷=
①27× ÷
② ÷ ÷
③ ÷ ×
④ + + + +
⑤ + + + +
⑥ × ÷
9.6-9.6×
56× 1.25××80×1.3