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a, - \(\dfrac{11}{25}\) = \(\dfrac{-6}{25}\) + \(\dfrac{-5}{25}\) +
- \(\dfrac{11}{25}\) = \(\dfrac{-1}{25}\) + \(\dfrac{-10}{25}\) +
- \(\dfrac{11}{25}\) = \(\dfrac{-3}{25}\) + \(\dfrac{-8}{25}\) +
b, - \(\dfrac{11}{25}\) = \(\dfrac{6}{25}\) - \(\dfrac{17}{25}\)
- \(\dfrac{11}{25}\) = \(\dfrac{7}{25}\) - \(\dfrac{18}{25}\)
- \(\dfrac{11}{25}\) = \(\dfrac{8}{25}\) - \(\dfrac{19}{25}\)
a) \(\dfrac{-7}{20}=\dfrac{1}{5}.\dfrac{-7}{4}\) b) \(\dfrac{-7}{20}=\dfrac{-7}{40}:\dfrac{1}{2}\) c) \(\dfrac{-7}{20}=\dfrac{2}{5}+\dfrac{-3}{4}\) d) \(\dfrac{-7}{20}=\dfrac{-1}{5}+\dfrac{-3}{20}\)
a)\(\dfrac{-7}{20}=\dfrac{-7}{10}\times\dfrac{1}{2}\)
b)\(\dfrac{-7}{20}=\dfrac{-7}{40}\times\dfrac{1}{2}\)
c)\(\dfrac{-7}{20}=\dfrac{7}{20}+\dfrac{-7}{10}\)
d)\(\dfrac{-7}{20}=\dfrac{-1}{5}+\dfrac{-3}{20}\)
a) \(\frac{7}{2}.\frac{-1}{10}\)
b)\(7:\left(-20\right)\)
c)\(\frac{7}{20}+\frac{-7}{10}\)
d)\(\frac{-1}{5}+\frac{-3}{20}\)
a) \(-\frac{15}{32}=-\frac{1}{4}+\left(-\frac{7}{32}\right)\)
b) \(-\frac{15}{32}=\frac{1}{32}-\frac{1}{2}\)
a) how to âm cộng âm ra dương
b) 720 = 1000 - 280
~~~~hok tốt~~~~
a) -3/20 + -4/20 = -7/20
b) 1/20 - 8/20 = -7/20
học tốt, nhớ cố gắng
Câu 1.
$\frac{1}{15}-\frac{9}{15}=\frac{-8}{15}$
$\frac{2}{15}-\frac{10}{15}=\frac{-8}{15}$
$\frac{3}{15}-\frac{11}{15}=\frac{-8}{15}$
Câu 2:
$\frac{-9}{15}+\frac{1}{15}=\frac{-8}{15}$
$\frac{-10}{15}+\frac{2}{15}=\frac{-8}{15}$
$\frac{-11}{15}+\frac{3}{15}=\frac{-8}{15}$
a: \(\frac{4}{19}=\frac{2}{19}+\frac{2}{19}\)
b: \(\frac{-11}{15}=\frac{-10}{15}+\frac{-1}{15}\)
\(-\frac{11}{15}=\frac{-9}{15}+\frac{-2}{15}\)
\(-\frac{11}{15}=-\frac{8}{15}+\frac{-3}{15}\)
a) Hai số hữu tỉ có tổng là 4/19 có thể là:
1/19 và 3/19 vì 1/19 + 3/19 = 4/19
2/19 và 2/19 vì 2/19 + 2/19 = 4/19