四年級(jí)口算題：整十?dāng)?shù)除三位數(shù)

四年級(jí)口算題：整十?dāng)?shù)除三位數(shù)
    （1）800 ÷ 40 =
    （2）900 ÷ 90 =
    （3）450 ÷ 30 =
    （4）710 ÷ 10 =
    （5）480 ÷ 40 =
    （6）810 ÷ 30 =
    （7）900 ÷ 90 =
    （8）800 ÷ 80 =
    （9）200 ÷ 20 =
    （10）560 ÷ 20 =
    （11）870 ÷ 30 =
    （12）720 ÷ 60 =
    （13）960 ÷ 80 =
    （14）720 ÷ 30 =
    （15）700 ÷ 70 =