一、口算。
$29×4=$
$500-120=$
$218+360=$
$72÷3=$
$400÷4=$
$223×2=$
$13×7=$
$280÷4=$
$868÷2=$
$52÷4=$
$9×50=$
$537-311=$
$670+250=$
$850÷5=$
$202+319=$
$4×14=$
$540-480=$
$320÷8=$
$502×2=$
$2×190=$
$150+160=$
$301×2≈$
$97×3≈$
$454÷5≈$
$29×4=$
$500-120=$
$218+360=$
$72÷3=$
$400÷4=$
$223×2=$
$13×7=$
$280÷4=$
$868÷2=$
$52÷4=$
$9×50=$
$537-311=$
$670+250=$
$850÷5=$
$202+319=$
$4×14=$
$540-480=$
$320÷8=$
$502×2=$
$2×190=$
$150+160=$
$301×2≈$
$97×3≈$
$454÷5≈$
答案
1. $29×4=116$
2. $500-120=380$
3. $218+360=578$
4. $72÷3=24$
5. $400÷4=100$
6. $223×2=446$
7. $13×7=91$
8. $280÷4=70$
9. $868÷2=434$
10. $52÷4=13$
11. $9×50=450$
12. $537-311=226$
13. $670+250=920$
14. $850÷5=170$
15. $202+319=521$
16. $4×14=56$
17. $540-480=60$
18. $320÷8=40$
19. $502×2≈1004$
20. $2×190=380$
21. $150+160=310$
22. $301×2≈600$
23. $97×3≈300$
24. $454÷5≈90$
2. $500-120=380$
3. $218+360=578$
4. $72÷3=24$
5. $400÷4=100$
6. $223×2=446$
7. $13×7=91$
8. $280÷4=70$
9. $868÷2=434$
10. $52÷4=13$
11. $9×50=450$
12. $537-311=226$
13. $670+250=920$
14. $850÷5=170$
15. $202+319=521$
16. $4×14=56$
17. $540-480=60$
18. $320÷8=40$
19. $502×2≈1004$
20. $2×190=380$
21. $150+160=310$
22. $301×2≈600$
23. $97×3≈300$
24. $454÷5≈90$
二、用竖式计算,带⭐ 的要验算。
$5×536=$
$543÷8=$
⭐ $482÷3=$ 
$345×9=$
$472×7=$
⭐ $345÷6=$
$5×536=$
$543÷8=$
$345×9=$
$472×7=$
答案
1. $5×536=2680$
2. $543÷8=67······7$
3. ⭐$482÷3=160······2$
4. $345×9=3105$
5. $472×7=3304$
6. ⭐$345÷6=57······3$
2. $543÷8=67······7$
3. ⭐$482÷3=160······2$
4. $345×9=3105$
5. $472×7=3304$
6. ⭐$345÷6=57······3$
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