一、口算。
$0.36×200=$ $10.1×0.3=$ $0.07÷0.35=$
$0.81÷2.7=$ $1.34-0.4=$ $3.6+6.34=$
$8.5÷1.7=$ $3.5×0.2=$ $0.081×10=$
$75÷2.5=$ $0.96÷0.8=$ $15+1.5=$
$1.25÷0.25=$ $0.65÷0.13=$ $0.186-0.06=$
$3.4×4=$ $0.5×0.4=$ $0.8÷0.25=$
$3÷0.4=$ $2.5×0.6=$ $6-0.025=$
$7.82÷0.2=$ $2.19+9.1=$ $7÷0.2=$

一、72 3.03 0.2 0.3 0.94 9.94 5 0.7 0.81 30 1.2 16.5 5 5 0.126 13.6 0.2 3.2 7.5 1.5 5.975 39.1 11.29 35

$0.36×200=72$
$10.1×0.3=3.03$
$0.07÷0.35=0.2$
$0.81÷2.7=0.3$
$1.34-0.4=0.94$
$3.6+6.34=9.94$
$8.5÷1.7=5$
$3.5×0.2=0.7$
$0.081×10=0.81$
$75÷2.5=30$
$0.96÷0.8=1.2$
$15+1.5=16.5$
$1.25÷0.25=5$
$0.65÷0.13=5$
$0.186-0.06=0.126$
$3.4×4=13.6$
$0.5×0.4=0.2$
$0.8÷0.25=3.2$
$3÷0.4=7.5$
$2.5×0.6=1.5$
$6-0.025=5.975$
$7.82÷0.2=39.1$
$2.19+9.1=11.29$
$7÷0.2=35$

二、计算下面各题。
$23.8+0.728÷13$ $(9.79+7.49)÷4.8$ $7.05÷(0.47×20)+3.62$
$6.5×2.6-0.25$ $5.5-4.37÷2.3$ $4.5×1.4+8.64÷2.7$

二、23.856 3.6 4.37 16.65 3.6 9.5

$23.8+0.728÷13$
$=23.8+0.056$
$=23.856$
$(9.79+7.49)÷4.8$
$=17.28÷4.8$
$=3.6$
$7.05÷(0.47×20)+3.62$
$=7.05÷9.4+3.62$
$=0.75+3.62$
$=4.37$
$6.5×2.6-0.25$
$=16.9-0.25$
$=16.65$
$5.5-4.37÷2.3$
$=5.5-1.9$
$=3.6$
$4.5×1.4+8.64÷2.7$
$=6.3+3.2$
$=9.5$