Question

Tính nhanh:

\(\frac{3}{1.4}+\frac{3}{4.7}+\frac{3}{7.10}\)

Answer 1

Trả lời

3/1.4+3/4.7+3/7.10

=3/1.3/10

=3/10

Chúc bạn học tốt #

Answer 2

\(\frac{3}{1.4}+\frac{3}{4.7}+\frac{3}{7.10}\)

\(=\frac{1}{1}-\frac{1}{4}+\frac{1}{4}-\frac{1}{7}+\frac{1}{7}-\frac{1}{10}\)

\(=\frac{1}{1}-\frac{1}{10}=\frac{9}{10}\)

Answer 3

\(\frac{3}{1.4}+\frac{3}{4.7}+\frac{3}{7.10}\)

\(=\frac{1}{1}-\frac{1}{4}+\frac{1}{4}-\frac{1}{7}+\frac{1}{7}-\frac{1}{10}\)

\(=\frac{1}{1}-\frac{1}{10}=\frac{10}{10}-\frac{1}{10}\)

\(=\frac{9}{10}\)

Answer 4

\(\frac{3}{1.4}\) + \(\frac{3}{4.7}\) +\(\frac{3}{7.10}\)

= \(\frac{1}{1}\)  \(+\frac{1}{4}\) - \(\frac{1}{4}\) + \(\frac{1}{7}\) - \(\frac{1}{7}\) - \(\frac{1}{10}\) 

= \(\frac{1}{1}\) - \(\frac{1}{10}\) 

= \(\frac{9}{10}\)

Answer 5

đây là toán lớp 6 nghen

Answer 6

\(\frac{3}{1.4}+\frac{3}{4.7}+\frac{3}{7.10}\)

\(=\frac{1}{1}-\frac{1}{4}+\frac{1}{4}-\frac{1}{7}+\frac{1}{7}-\frac{1}{10}\)

\(=\frac{1}{1}-\frac{1}{10}\)

\(=\frac{9}{10}\)