《2025年口算训练六年级数学上册人教版双色升级版》

$7.5×\frac {1}{6}= $
$3.6×\frac {1}{4}= $
$0.4×\frac {1}{12}= $
$10×\frac {18}{5}= $
$1.8×\frac {2}{3}= $
$75×\frac {1}{10}= $
$33×\frac {1}{12}= $
$110×\frac {1}{15}= $
$17×\frac {1}{19}= $
$0.8×\frac {5}{16}= $
$1.6×\frac {2}{11}= $
$1.2×\frac {7}{36}= $
$60×\frac {1}{18}= $

答案： 解析：
这些题目都是基础的数学运算题目，主要考查分数与小数的乘法运算。
对于这类题目，我们直接将小数与分数的分子相乘，然后除以分数的分母，即可得出结果。
如果结果可以化简，则需要进行化简。
答案：
$7.5 × \frac{1}{6} = \frac{7.5}{6} = 1.25$
$3.6 × \frac{1}{4} = \frac{3.6}{4} = 0.9$
$0.4 × \frac{1}{12} = \frac{0.4}{12} = \frac{1}{30}$
$10 × \frac{18}{5} = \frac{10 × 18}{5} = 36$
$1.8 × \frac{2}{3} = \frac{1.8 × 2}{3} = 1.2$
$75 × \frac{1}{10} = \frac{75}{10} = 7.5$
$33 × \frac{1}{12} = \frac{33}{12} = \frac{11}{4}=2.75$
$110 × \frac{1}{15} = \frac{110}{15} = \frac{22}{3}$
$17 × \frac{1}{19} = \frac{17}{19}$
$0.8 × \frac{5}{16} = \frac{0.8 × 5}{16} = 0.25$
$1.6 × \frac{2}{11} = \frac{1.6 × 2}{11} = \frac{3.2}{11}=\frac{16}{55}$
$1.2 × \frac{7}{36} = \frac{1.2 × 7}{36} = \frac{7}{30}$
$60 × \frac{1}{18} = \frac{60}{18} = \frac{10}{3}$

$\frac {4}{5}×5.5=$4.4
$\frac {2}{5}×4.5=$1.8
$\frac {1}{5}×6.5=$1.3
$\frac {2}{7}×5.6=$1.6
$\frac {3}{56}×40=$$\frac{15}{7}$（或≈2.143）
$\frac {7}{8}×3.2=$2.8
$\frac {1}{6}×4.2=$0.7
$\frac {7}{32}×0.8=$0.175
$\frac {4}{5}×1.5=$1.2
$\frac {5}{12}×0.6=$0.25
$\frac {2}{3}×0.9=$0.6
$\frac {7}{8}×7.2=$6.3
$\frac {2}{5}×3.5=$1.4

答案： 解析：
这些题目都是分数与小数的乘法计算题。
我们需要将分数与小数相乘，得出最终结果。
答案：
1. $\frac{4}{5} × 5.5$
$= \frac{4 × 5.5}{5}$
$= \frac{22}{5}$
$= 4.4$
2. $\frac{2}{5} × 4.5$
$= \frac{2 × 4.5}{5}$
$= \frac{9}{5}$
$= 1.8$
3. $\frac{1}{5} × 6.5$
$= \frac{6.5}{5}$
$= 1.3$
4. $\frac{2}{7} × 5.6$
$= \frac{2 × 5.6}{7}$
$= \frac{11.2}{7}$
$= 1.6$
5. $\frac{3}{56} × 40$
$= \frac{3 × 40}{56}$
$= \frac{120}{56}$
$= \frac{15}{7}$
$\approx 2.143$ (保留三位小数)
6. $\frac{7}{8} × 3.2$
$= \frac{7 × 3.2}{8}$
$= \frac{22.4}{8}$
$= 2.8$
7. $\frac{1}{6} × 4.2$
$= \frac{4.2}{6}$
$= 0.7$
8. $\frac{7}{32} × 0.8$
$= \frac{7 × 0.8}{32}$
$= \frac{5.6}{32}$
$= 0.175$
9. $\frac{4}{5} × 1.5$
$= \frac{4 × 1.5}{5}$
$= \frac{6}{5}$
$= 1.2$
10. $\frac{5}{12} × 0.6$
$= \frac{5 × 0.6}{12}$
$= \frac{3}{12}$
$= 0.25$
11. $\frac{2}{3} × 0.9$
$= \frac{2 × 0.9}{3}$
$= \frac{1.8}{3}$
$= 0.6$
12. $\frac{7}{8} × 7.2$
$= \frac{7 × 7.2}{8}$
$= \frac{50.4}{8}$
$= 6.3$
13. $\frac{2}{5} × 3.5$
$= \frac{2 × 3.5}{5}$
$= \frac{7}{5}$
$= 1.4$

$2.1×\frac {2}{3}=$1.4
$\frac {5}{27}×90=$$\frac{50}{3}$
$6.3×\frac {2}{9}=$1.4
$4.4×\frac {5}{11}=$2
$\frac {5}{6}×\frac {2}{15}=$$\frac{1}{9}$
$\frac {4}{5}×\frac {2}{5}=$$\frac{8}{25}$
$3×\frac {1}{12}=$$\frac{1}{4}$
$\frac {5}{24}×96=$20
$\frac {2}{3}×\frac {7}{12}=$$\frac{7}{18}$
$5×\frac {3}{4}=$$\frac{15}{4}$
$\frac {7}{18}×\frac {4}{7}=$$\frac{2}{9}$
$\frac {3}{32}×80=$$\frac{15}{2}$
$6×\frac {5}{72}=$$\frac{5}{12}$

答案： 解析：这些题目都是基础的数学运算题目，主要考查分数与小数、整数之间的乘法运算。
答案：
$2.1 × \frac{2}{3} = \frac{4.2}{3} = 1.4$
$\frac{5}{27} × 90 = \frac{450}{27} = \frac{50}{3}$
$6.3 × \frac{2}{9} = \frac{12.6}{9} = 1.4$
$4.4 × \frac{5}{11} = \frac{22}{11} = 2$
$\frac{5}{6} × \frac{2}{15} = \frac{10}{90} = \frac{1}{9}$
$\frac{4}{5} × \frac{2}{5} = \frac{8}{25}$
$3 × \frac{1}{12} = \frac{3}{12} = \frac{1}{4}$
$\frac{5}{24} × 96 = \frac{480}{24} = 20$
$\frac{2}{3} × \frac{7}{12} = \frac{14}{36} = \frac{7}{18}$
$5 × \frac{3}{4} = \frac{15}{4} = 3.75$
$\frac{7}{18} × \frac{4}{7} = \frac{28}{126} = \frac{2}{9}$
$\frac{3}{32} × 80 = \frac{240}{32} = \frac{15}{2} =7.5$
$6 × \frac{5}{72} = \frac{30}{72} = \frac{5}{12}$