÷4 4.2× 88÷ 88×
1÷ 1× ÷ × ×
× = 0.8× = 1- = 5÷ = + =
× = 2× = 6÷ = ×36= ÷ =
① × + ×
② ÷ -
③ ×6-
④ + ×
⑤ + ÷
⑥ × ÷
⑦ × ×
⑧( + )×( - )