1÷1%= 0.75×0.4= 10-0.86= +0.25=
125%×8= 1-1× = 1-56%= 18.84÷31.4=
24×( -
)=
-
×0= (
-
)×3.5=
=
199+ ×
=
-1= 63.2÷6.9≈ 19×498≈