1. 直接写出得数。(32☆)
$6÷2= $ $45÷5= $ $9÷3= $ $12÷3= $
$60÷2= $ $450÷5= $ $90÷3= $ $120÷3= $
$600÷2= $ $450÷9= $ $900÷3= $ $120÷4= $
$30÷5= $ $20÷4= $ $10÷2= $ $27÷9= $
$300÷5= $ $200÷4= $ $100÷2= $ $270÷9= $
$300÷6= $ $200÷5= $ $100÷5= $ $270÷3= $
$800÷8= $ $160÷4= $ $640÷8= $ $210÷3= $
$70÷7= $ $540÷9= $ $90÷9= $ $140÷2= $

3 9 3 4
30 90 30 40
300 50 300 30
6 5 5 3
60 50 50 30
50 40 20 90
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100 40 80 70
10 60 10 70

2. 想一想,填一填。(12☆)
$\begin{array}{r} \boxed {8}\boxed {00}\\ \downarrow \downarrow \\ 8÷4= \square \end{array} ÷4= ()$添()个0是()
$\begin{array}{r} \boxed {24}\boxed {0}\\ \downarrow \downarrow \\ 24÷4= \square \end{array} ÷4= ()$添()个0是()
因为$8÷4= ()$
所以$800÷4= ()$
因为$24÷4= ()$
所以$240÷4= ()$

200 2 2 200 2 200
60 6 1 60 6 60

3. 计算下面各题。(6☆)
$900÷3-300$ $40+360÷4$ $540÷6÷3$
用时：____分钟
共得：____☆/50☆

0 130 30