1 直接写出得数。(每题1分,共20分)
624 - 14 = 987×2 = 471×90 = 800÷4 =
59 + 28 = 789 - 123 = 891 + 32 = 345×3 =
426×20 = 450÷9 = 90 - 35 = 654 + 345 =
0.26×10 = 8.09×100 = 80.9×100 = 0.809×10000 =
1.108÷10 = 1.108÷100 = 11.08÷1000 = 136.5÷10 =

610 1974 42390 200
87 666 923 1035
8520 50 55 999
2.6 809 8090 8090
0.1108 0.01108 0.01108 13.65

2 列竖式计算。(每题3分,共12分)
390÷60 = 506×24 = 665÷25 = 125×43 =

竖式略
6……30 12144
26……15 5375

3 计算下面各题,能简算的要简算。(每题3分,共18分)
2400÷25÷4 132×58 - 58×32 600×[285÷(124 - 105)]
125×32×25 275×36 + 275×65 - 275 270÷(600 - 37×15)

24 5800 9000
100000 27500 6