43 56 75 38 16 83
14-9=( )
15-8=( )
48
51
53
50+3 9+70 4+50 95-5
简算依据:
①x:3=:
②=
③:=:x
④:x=3:12
⑤:x=5%:0.6
⑥=
3.2÷0.01= 5.6+3.99= ÷ =
× = 4.1+1÷2=