一、口算。
$0.72×0.5=$
$0.24+0.6=$
$4.3-0.25=$
$9.6÷0.3=$
$7a-6a=$
$0.83+0.38=$
$15×0.4=$
$1.24÷0.4=$
$0.72×0.5=$
0.36
$2.6÷0.13=$20
$0.28÷0.4÷7=$0.1
$0.24+0.6=$
0.84
$11.2×0.3=$3.36
$25×1.1-25=$2.5
$4.3-0.25=$
4.05
$0.82×0.3=$0.246
$6.5-(0.6+2.5)=$3.4
$9.6÷0.3=$
32
$30.2-3.02=$27.18
$8.5-0.24-1.76=$6.5
$7a-6a=$
a
$9x÷3=$3x
$1.5÷0.3-0.2=$4.8
$0.83+0.38=$
1.21
$15.2÷0.8=$19
$125×0.08×0.3=$3
$15×0.4=$
6
$0.1÷0.5=$0.2
$1.5+0.25×4=$2.5
$1.24÷0.4=$
3.1
$1.4×3=$4.2
$0.48-0.48÷12=$0.44
答案
一、0.36 20 0.1
0.84 3.36 2.5
4.05 0.246 3.4
32 27.18 6.5
a 3x 4.8
1.21 19 3
6 0.2 2.5
3.1 4.2 0.44
0.84 3.36 2.5
4.05 0.246 3.4
32 27.18 6.5
a 3x 4.8
1.21 19 3
6 0.2 2.5
3.1 4.2 0.44
二、计算下面各题,怎样简便就怎样计算。
$(16.5×3+3×7.5)÷6$ $5.98×10.9-0.9×5.98$
$21.9-1.9×0.4÷7.6$ $6.5×[(24.6-18.8)÷2.5]$
$(16.5×3+3×7.5)÷6$ $5.98×10.9-0.9×5.98$
$21.9-1.9×0.4÷7.6$ $6.5×[(24.6-18.8)÷2.5]$
答案
二、12 59.8
21.8 15.08
21.8 15.08
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