《2025年速算天地数学口算心算五年级上册苏教版》

3.6÷0.4=9
0.35÷0.5=0.7
0.4÷0.2=2
0.72÷0.9=0.8
4.9÷0.7=7
5.4÷0.6=9
4.2÷0.7=6
0.64÷0.8=0.8
0÷0.5=0
2.1÷0.3=7
3.6÷0.6=6
0.24÷0.3=0.8
0.72÷0.8=0.9
0.16÷0.4=0.4
2.8÷0.7=4
4.5÷5=0.9
54÷0.9=60
6.4÷0.8=8
0.21÷0.7=0.3
0.12÷0.4=0.3
1.8÷0.3=6
2.8÷1.4=2
3.5÷0.5=7
0.24÷0.4=0.6
3.6÷0.9=4
0.8÷0.4=2
0.4÷0.5=0.8
2.7÷0.3=9
2.4÷8=0.3
0.63÷0.9=0.7
0.27÷0.3=0.9
0÷0.6=0
1.5÷0.5=3
0.4÷0.8=0.5
2.1÷0.7=3
4.2÷6=0.7
0.36÷0.6=0.6
0.2÷0.4=0.5
0.42÷0.7=0.6
0.9÷0.1=9

答案： 解析：题目给出了多道除法口算题，主要考查小数的除法运算。
在进行小数除法时，可以将除数和被除数都乘以10的某个倍数，使除数变为整数，从而简化计算。
答案：
$3.6 ÷ 0.4 = 9$
$0.35 ÷ 0.5 = 0.7$
$0.4 ÷ 0.2 = 2$
$0.72 ÷ 0.9 = 0.8$
$4.9 ÷ 0.7 = 7$
$5.4 ÷ 0.6 = 9$
$4.2 ÷ 0.7 = 6$
$0.64 ÷ 0.8 = 0.8$
$0 ÷ 0.5 = 0$
$2.1 ÷ 0.3 = 7$
$3.6 ÷ 0.6 = 6$
$0.24 ÷ 0.3 = 0.8$
$0.72 ÷ 0.8 = 0.9$
$0.16 ÷ 0.4 = 0.4$
$2.8 ÷ 0.7 = 4$
$4.5 ÷ 5 = 0.9$
$54 ÷ 0.9 = 60$
$6.4 ÷ 0.8 = 8$
$0.21 ÷ 0.7 = 0.3$
$0.12 ÷ 0.4 = 0.3$
$1.8 ÷ 0.3 = 6$
$2.8 ÷ 1.4 = 2$
$3.5 ÷ 0.5 = 7$
$0.24 ÷ 0.4 = 0.6$
$3.6 ÷ 0.9 = 4$
$0.8 ÷ 0.4 = 2$
$0.4 ÷ 0.5 = 0.8$
$2.7 ÷ 0.3 = 9$
$2.4 ÷ 8 = 0.3$
$0.63 ÷ 0.9 = 0.7$
$0.27 ÷ 0.3 = 0.9$
$0 ÷ 0.6 = 0$
$1.5 ÷ 0.5 = 3$
$0.4 ÷ 0.8 = 0.5$
$2.1 ÷ 0.7 = 3$
$4.2 ÷ 6 = 0.7$
$0.36 ÷ 0.6 = 0.6$
$0.2 ÷ 0.4 = 0.5$
$0.42 ÷ 0.7 = 0.6$
$0.9 ÷ 0.1 = 9$