《2025年快乐口算六年级数学上册人教版》

1. 算一算。
$ \frac{6}{7} × \frac{6}{7} = $
$ \frac{5}{6} × 1 = $
$ 0.9 × \frac{3}{18} = $
$ \frac{5}{11} × 121 = $
$ 2.4 × \frac{5}{3} = $
$ \frac{3}{10} × \frac{1}{3} = $
$ \frac{3}{7} × 3 = $
$ \frac{6}{19} × \frac{5}{12} = $

答案： 1.
$\frac{6}{7} × \frac{6}{7} = \frac{6 × 6}{7 × 7} = \frac{36}{49}$
2.
$\frac{5}{6} × 1 = \frac{5}{6}$
3.
$0.9 × \frac{3}{18} = \frac{9}{10} × \frac{3}{18} = \frac{9 × 3}{10 × 18} = \frac{27}{180} = \frac{3}{20} = 0.15$
4.
$\frac{5}{11} × 121 = \frac{5 × 121}{11} = \frac{605}{11} = 55$
5.
$2.4 × \frac{5}{3} = \frac{24}{10} × \frac{5}{3} = \frac{24 × 5}{10 × 3} = \frac{120}{30} = 4$
6.
$\frac{3}{10} × \frac{1}{3} = \frac{3 × 1}{10 × 3} = \frac{3}{30} = \frac{1}{10}$
7.
$\frac{3}{7} × 3 = \frac{3 × 3}{7} = \frac{9}{7}$
8.
$\frac{6}{19} × \frac{5}{12} = \frac{6 × 5}{19 × 12} = \frac{30}{228} = \frac{5}{38}$

2. 比一比。
30 分$◯ \frac{1}{2}$时
$\frac{1}{3}$年$◯$3 月
1 天的$\frac{3}{4} ◯$12 时
根据图意填空并列式计算。
(1)


(2)

答案： 2. =；＞；＞
(1)150m²；150×6/15=60(m²)
(2)60；180×2/3×1/2=60(m²)

请你试一试:$\frac{3}{5} × \frac{1}{2} + \frac{3}{5} × \frac{3}{4} - \frac{3}{5} × \frac{1}{4} = \frac{3}{5} ×$$ = $$×$$ = $

答案： $\frac{1}{2} + \frac{3}{4} - \frac{1}{4}$，$\frac{3}{5}$，1，$\frac{3}{5}$