直接写得数。

40÷2=             25×40=            300÷5=               6300÷7=

60×4=             70÷2=             20×30=               15×30=

36÷3=             5.6-2.5=           40×5=                 0÷56=

0×350=            58÷2=             1-0.4=                 5.6+2=

1.8+4.5=           16×5=             320÷8=                75+25÷5=

144÷7≈            716÷8≈            102×6≈                32×59≈