一、口算。
$4.06×0.5=$
$0.52+0.48=$
$3.9+2.91=$
$4.8÷48=$
$2.19+9.1=$
$39.2÷0.8=$
$1.76×0.5=$
$2.7×60=$
$4.06×0.5=$
2.03
$3.6÷0.18=$20
$4.8÷0.2×0.5=$12
$0.52+0.48=$
1
$2.4×0.3=$0.72
$1.5×0.2÷0.3=$1
$3.9+2.91=$
6.81
$2.5-0.05=$2.45
$4.5×4×0.2=$3.6
$4.8÷48=$
0.1
$6.03÷0.9=$6.7
$0.5+0.5×0.6=$0.8
$2.19+9.1=$
11.29
$1.2×0.8=$0.96
$0.9×7+10.7=$17
$39.2÷0.8=$
49
$1.5÷0.03=$50
$6.8-2.4÷3=$6
$1.76×0.5=$
0.88
$3.2×50=$160
$8.5-0.24-1.76=$6.5
$2.7×60=$
162
$0.12÷0.3=$0.4
$7.2-1.2+6.7=$12.7
答案
一、2.03 20 12
1 0.72 1
6.81 2.45 3.6
0.1 6.7 0.8
11.29 0.96 17
49 50 6
0.88 160 6.5
162 0.4 12.7
1 0.72 1
6.81 2.45 3.6
0.1 6.7 0.8
11.29 0.96 17
49 50 6
0.88 160 6.5
162 0.4 12.7
二、计算下面各题,怎样简便就怎样计算。
$(8.1+2.32)×3.6-2.78$ $8.32×3.4+8.32×6.6$
$0.84×0.25+0.06÷4$ $(80.82-74.07)÷1.5×3$
$(8.1+2.32)×3.6-2.78$ $8.32×3.4+8.32×6.6$
$0.84×0.25+0.06÷4$ $(80.82-74.07)÷1.5×3$
答案
二、34.732 83.2
0.225 13.5
0.225 13.5
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