×4 0.2×5 ×9
÷3 ÷ ×
10× = × = × = ÷ =
÷ = × = 28× = ÷ =
① ×25× ×19
② × ÷
③3+ ×13-
④18÷ ÷
⑤( - )×36
⑥ ÷( + + )