《2024年小学同步练习册四年级数学上册青岛版54制青岛出版社》

3.算一算。
(1)直接写得数。
$7.38×10= $
$3.7×0.3= $
$4.6×6= $
$4.19×10= $
$3.2×5= $
$5.5×0.2= $
$0.7×0.9= $
$1.2×0.9= $
(2)用竖式计算。
$3.78×4.7= $
$0.86×1.4= $
$4.16×3.5= $
$0.056×0.15= $
(3)计算下列题,能简算的要简算。
$1.25×4.2×0.8$
$0.73×99$
$5.1×8.4 - 2.84$
$1.37×0.59 - 0.37×0.59$
$0.87×3.16 + 4.84×0.87$

答案：
73.8
1.11
27.6
41.9
16
1.1
0.63
1.08

17.766

1.204

14.56

0.0084
=1.25×0.8×4.2
=1×4.2
=4.2
=0.73×100-0.73×1
=73-0.73
=72.27
=42.84-2.84
=40
=0.59×(1.37-0.37)
=0.59×1
=0.59
=0.87×(3.16+4.84)
=0.87×8
=6.96