2025年通城学典计算能手五年级数学上册苏教版第90页答案
一、口算。
$21.7÷0.7=$
31
$1.25×8=$
10
$0.4×0.4=$
0.16

$10-2.65=$
7.35
$7.9÷0.79=$
10
$0.48×50=$
24

$4.43+6.57=$
11
$6.25÷2.5=$
2.5
$7.2÷0.036=$
200

$0.24×50=$
12
$8.8÷0.2=$
44
$3.25×4=$
13

$2.01+0.9=$
2.91
$2.2+3.57=$
5.77
$1.5×0.9=$
1.35

$1.02-0.43=$
0.59
$0.04×0.6=$
0.024
$23.2÷8=$
2.9

$1.125×8=$
9
$0.28×0.5=$
0.14
$3.2×0.02=$
0.064

$5.2+4.25=$
9.45
$9-0.8=$
8.2
$0.9÷4.5=$
0.2

答案

31 10 0.16 7.35 10 24 11 2.5 200 12 44 13 2.91 5.77 1.35 0.59 0.024 2.9 9 0.14 0.064 9.45 8.2 0.2
二、计算下面各题,怎样简便就怎样计算。
$18.4+17.6×4.1-35.8$ $(38-12.4)×(13.8÷0.6)$
$0.25×8.1×1.6$ $25.05÷[(4.78+10.25)÷0.3]$

答案

54.76 588.8 3.24 0.5

解析

18.4+17.6×4.1-35.8
=18.4+72.16-35.8
=90.56-35.8
=54.76
(38-12.4)×(13.8÷0.6)
=25.6×23
=588.8
0.25×8.1×1.6
=0.25×1.6×8.1
=0.4×8.1
=3.24
25.05÷[(4.78+10.25)÷0.3]
=25.05÷[15.03÷0.3]
=25.05÷50.1
=0.5