÷3=90 ×3 =60
400÷5的商的末尾有个0。
704×8= ★469+ 283= 630×7=
370+450= ★924-536= 145×6=
1÷0.25= +1 = ×24= + =
400×0.02= 10÷ = 6 ×0= 3× ﹣ ×3=