① 直接写出得数。(每题1分,共16分)
$82÷4\approx$
$118÷4\approx$
$492÷7\approx$
$453÷5\approx$
$631÷3\approx$
$349÷7\approx$
$207÷5\approx$
$361÷6\approx$
$137÷7\approx$
$724÷9\approx$
$901÷3\approx$
$556÷7\approx$
$396÷8\approx$
$161÷8\approx$
$453÷9\approx$
$274÷3\approx$

1. $82÷4\approx20$
$118÷4\approx30$
$492÷7\approx70$
$453÷5\approx90$
$631÷3\approx210$
$349÷7\approx50$
$207÷5\approx40$
$361÷6\approx60$
$137÷7\approx20$
$724÷9\approx80$
$901÷3\approx300$
$556÷7\approx80$
$396÷8\approx50$
$161÷8\approx20$
$453÷9\approx50$
$274÷3\approx90$

② 填一填，使估算的商尽可能接近实际的商。(每题1分，共4分)
$3□6÷5\approx60$
$4□8÷6\approx80$
$3□8÷8\approx40$
$4□3÷5\approx90$

2. 依次填入：0、7、1、5

③ 列竖式计算。(每题3分,共18分)
$234×7=$
$124×6=$
$371×3=$
$654-347=$
$241+369=$
$774-297=$

3. 竖式略
$234×7=1638$
$124×6=744$
$371×3=1113$
$654-347=307$
$241+369=610$
$774-297=477$

④ 计算。(每题4分,共12分)
$267+150÷3$
$480÷6-29$
$370×2-410$

4. $267+150÷3=317$
$480÷6-29=51$
$370×2-410=330$