600÷3= 0÷82= 450÷5= 630÷9=
280÷7= 20×40= 210×3= 50×60=
45×3= 70×0= 810÷4≈ 81×38≈
①38×25=
②40×26=
③481÷8=
④△508÷7=
①836-192÷8×16
②1.4÷(1.4+0.7)
③0.8×0.4×12.5×0.25
④ ÷6+ ÷20
⑤14×19×( + )
⑥ ÷[( + )÷ ]
3.5+2.5= 10﹣0.35= 0.56÷0.7= 20%×5%= 12:2.4=
25×0.8= 9﹣2= 3.75+1= 0÷18= :=