一、口算。
$7 × 5 =$$ $$11 × 2 =$$ $$33 ÷ 3 =$
$44 - 18 =$$ $$23 × 3 =$$ $$67 ÷ 9 =$
$31 × 2 =$$ $$64 ÷ 2 =$$ $$44 × 2 =$
$42 ÷ 6 =$$ $$14 × 2 =$$ $$80 ÷ 8 =$
$66 - 28 =$$ $$86 ÷ 2 =$$ $$61 ÷ 8 =$
$9 × 5 =$$ $$32 × 3 =$$ $$48 ÷ 4 =$
$65 + 27 =$$ $$20 × 4 =$$ $$55 ÷ 5 =$
$36 ÷ 6 =$$ $$21 × 3 =$$ $$68 ÷ 2 =$
$64 ÷ 8 =$$ $$13 × 2 =$$ $$69 ÷ 3 =$
$33 + 29 =$$ $$22 × 3 =$$ $$40 ÷ 9 =$

一、35 22 11
26 69 7······4
62 32 88
7 28 10
38 43 7······5
45 96 12
92 80 11
6 63 34
8 26 23
62 66 4······4

二、照样子，填一填。
$2537 = 2000 + 500 + 30 + 7$
$4260 = □ + □ + □$
$5800 = □ + □$
$7208 = □ + □ + □$
$9005 = □ + □$

二、4000 200 60
5000 800
7000 200 8
9000 5