《2025年口算基础训练六年级数学上册人教版》

求比值
$2:\frac{2}{11}=$11
$\frac{7}{12}:\frac{5}{6}=$$\frac{7}{10}$
$\frac{5}{2}:10=$$\frac{1}{4}$
$1.25:2.5=$0.5
$1.8:9=$0.2
$0.5:0.4=$1.25
5 厘米:10 厘米=0.5
3 分米:0.8 米=0.375
3 吨:4000 千克=0.75
2.7 吨:8.1 吨=$\frac{1}{3}$
$5\ \text{m}^2:25\text{dm}^2=$20
填空
$7:( $7$)= 1$
$8:( $5$)= 1.6$
$( $$\frac{2}{3}$$):2= \frac{1}{3}$
$( $1$):3= \frac{1}{3}$
$( $$\frac{1}{2}$$):\frac{1}{12}= 6$
$( $6$):\frac{3}{8}= 16$
$5:( $2.5$)= 2$
$4:( $3.5$)= \frac{8}{7}$
$2:( $4$)= \frac{1}{2}$
$( $$\frac{2}{9}$$):\frac{1}{3}= \frac{2}{3}$

答案： 解析：这些题目主要考查比值计算以及比例的基本性质。比值计算中，主要步骤是利用除法来找出两个数的比。在填空部分，需要通过已知的比值关系，利用等式解出未知数。
答案：
$2:\frac{2}{11} = 2 ÷ \frac{2}{11} = 11$
$\frac{7}{12}:\frac{5}{6} = \frac{7}{12} ÷ \frac{5}{6} = \frac{7}{10}$
$\frac{5}{2}:10 = \frac{5}{2} ÷ 10 = \frac{1}{4}$
$1.25:2.5 = 1.25 ÷ 2.5 = 0.5$
$1.8:9 = 1.8 ÷ 9 = 0.2$
$0.5:0.4 = 0.5 ÷ 0.4 = 1.25$
$5 \text{ 厘米}:10 \text{ 厘米} = 5 ÷ 10 = 0.5$
$3 \text{ 分米}:0.8 \text{ 米} = 3 ÷ (0.8 × 10) = 0.375$
$3 \text{ 吨}:4000 \text{ 千克} = 3000 ÷ 4000 = 0.75$
$2.7 \text{ 吨}:8.1 \text{ 吨} = 2.7 ÷ 8.1 = \frac{1}{3}$
$5\ \text{m}^2:25\text{dm}^2 = 5\ \text{m}^2 ÷ 0.25\ \text{m}^2 = 20$
$7:(7 )= 1$
$8:(5 )= 1.6$
$( \frac{2}{3} ):2= \frac{1}{3}$
$(1 ):3= \frac{1}{3}$
$( \frac{1}{2} ):\frac{1}{12}= 6$
$(6 ):\frac{3}{8}= 16$
$5:( 2.5)= 2$
$4:( 3.5)= \frac{8}{7}$
$2:( 4)= \frac{1}{2}$
$( \frac{2}{9} ):\frac{1}{3}= \frac{2}{3}$