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一、口算。
$0.25×16=$
$3.2×0.4=$
$0.65÷0.13=$
$50×1.6=$
$1.99+0.8=$
$1.5×0.03=$
$0.65×0.2=$
$4.8-3.08=$
$0.25×16=$
4
$0.18×20=$3.6
$8.1÷0.3=$27
$3.2×0.4=$
1.28
$2.63+3.7=$6.33
$0.89+1.9=$2.79
$0.65÷0.13=$
5
$1.1-0.001=$1.099
$0.81÷0.03=$27
$50×1.6=$
80
$7.2÷36=$0.2
$2.7+3=$5.7
$1.99+0.8=$
2.79
$2.73+3.27=$6
$4.2÷0.21=$20
$1.5×0.03=$
0.045
$0.45×40=$18
$1.35÷6=$0.225
$0.65×0.2=$
0.13
$350×0.02=$7
$2.04×5=$10.2
$4.8-3.08=$
1.72
$4.8×20=$96
$3.44÷0.4=$8.6
答案
一、4 3.6 27
1.28 6.33 2.79
5 1.099 27
80 0.2 5.7
2.79 6 20
0.045 18 0.225
0.13 7 10.2
1.72 96 8.6
1.28 6.33 2.79
5 1.099 27
80 0.2 5.7
2.79 6 20
0.045 18 0.225
0.13 7 10.2
1.72 96 8.6
二、计算下面各题,怎样简便就怎样计算。
$1.49×3.6÷2.4$ $3.8×6.2÷3.1+9.43$ $17.25-0.68-6.25-0.32$
$0.78×199$ $9.6÷0.6+9.6÷0.4$ $2.7×[(2.3+1.15)÷0.5]$
$1.49×3.6÷2.4$ $3.8×6.2÷3.1+9.43$ $17.25-0.68-6.25-0.32$
$0.78×199$ $9.6÷0.6+9.6÷0.4$ $2.7×[(2.3+1.15)÷0.5]$
答案
二、2.235 17.03 10
155.22 40 18.63
155.22 40 18.63
