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1. 直接写出得数。（8分）
$150×40=$ $24×500=$ $350×40=$ $202×20=$
$4200÷60=$ $320÷80=$ $630÷9=$ $4900÷700=$
$202×50\approx$ $102×98\approx$ $3000÷49\approx$ $807÷89\approx$
$150×40=$ $24×500=$ $350×40=$ $202×20=$
$4200÷60=$ $320÷80=$ $630÷9=$ $4900÷700=$
$202×50\approx$ $102×98\approx$ $3000÷49\approx$ $807÷89\approx$
答案：
1. 6000 12000 14000 4040 70 4 70 7 10000 10000 60 9
2. 不计算，直接写出结果。(4分)
(1)$18×240=4320$ $18×24=$() $36×24=$()
(2)$756÷27=28$ $7560÷270=$() $756÷54=$()
(1)$18×240=4320$ $18×24=$() $36×24=$()
(2)$756÷27=28$ $7560÷270=$() $756÷54=$()
答案：
2.
(1)432 864
(2)28 14
(1)432 864
(2)28 14
3. 列竖式计算。（带☆的要验算）（14分）
$217×27=$ ☆$408×24=$ $330×29=$
$678÷32=$ $580÷73=$ ☆$5700÷60=$
$217×27=$ ☆$408×24=$ $330×29=$
$678÷32=$ $580÷73=$ ☆$5700÷60=$
答案：
3. 5859 9792 9570 21······6 7······69 95
4. 找规律填空。(4分)
$9×9 - 1 = 80$ $999×11 = 10989$
$98×9 - 2 = 880$ $999×12 = 11988$
$987×9 - 3 = 8880$ $999×13 = 12987$
$9876×9 - 4 =$() $999×14 =$()
$987654×9 - 6 =$() $999×16 =$()
$9×9 - 1 = 80$ $999×11 = 10989$
$98×9 - 2 = 880$ $999×12 = 11988$
$987×9 - 3 = 8880$ $999×13 = 12987$
$9876×9 - 4 =$() $999×14 =$()
$987654×9 - 6 =$() $999×16 =$()
答案：
4. 88880 8888880 13986 15984
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