1 直接写出得数。(每题1分,共20分)
$321 - 123 = $ $931 + 37 = $ $543×10 = $ $912×90 = $
$810÷9 = $ $78 - 36 = $ $456 + 123 = $ $689 - 24 = $
$987×2 = $ $246×10 = $ $630÷3 = $ $248 + 17 = $
$125×8×9 = $ $50×8×2 = $ $4×15×25 = $ $202×8 = $
$27×30×2 = $ $103×7×10 = $ $200÷4÷25 = $ $900÷(4×25) = $

198 968 5430 82080
90 42 579 665
1974 2460 210 265
9000 800 1500 1616
1620 7210 2 9

2 列竖式计算,带※的要验算。(每题3分,共12分)
$132×38 = $ $109×67 = $ $888÷39 = $ ※$720÷24 = $

竖式及验算略
5016 7303 22……30 30

3 计算下面各题,能简算的要简算。(每题3分,共18分)
$125×39×8$ $50×69×20$ $8×(97×25)$
$28×65 + 32×65$ $29×19 + 15×29 - 29×24$ $(6 + 8)×125$

39000 69000 19400
3900 290 1750