①100-350÷5
②156+200÷4
③(370-180)×7
④540÷6÷3
⑤123+103×6
⑥5×(240÷8)
+ = 1- = 1.25× = - =
0.9+99×0.9= 0÷ = 1÷ = -0.5=
0.6×101= 3.2×2.5×12.5=