小學(xué)四年級(jí)口算題：整十?dāng)?shù)除幾百幾十?dāng)?shù)

小學(xué)四年級(jí)口算題：整十?dāng)?shù)除幾百幾十?dāng)?shù)
    （1）720 ÷ 90 =
    （2）980 ÷ 20 =
    （3）900 ÷ 50 =
    （4）960 ÷ 60 =
    （5）300 ÷ 30 =
    （6）450 ÷ 90 =
    （7）810 ÷ 90 =
    （8）680 ÷ 10 =
    （9）780 ÷ 60 =
    （10）540 ÷ 90 =
    （11）600 ÷ 50 =
    （12）340 ÷ 10 =
    （13）660 ÷ 60 =
    （14）510 ÷ 30 =
    （15）930 ÷ 30 =