a) \(\frac{11}{15}+\frac{5}{7}+\frac{2}{7}+\frac{4}{15}\)
\(=\left(\frac{11}{15}+\frac{4}{15}\right)+\left(\frac{5}{7}+\frac{2}{7}\right)\)
\(=\frac{15}{15}+\frac{7}{7}\)
\(=1+1\)
\(=2\)
b) \(\frac{17}{10}+\frac{1}{2}-\frac{7}{10}\)
\(=\left(\frac{17}{10}-\frac{7}{10}\right)+\frac{1}{2}\)
\(=1+\frac{1}{2}\)
\(=\frac{2}{2}+\frac{1}{2}\)
\(=\frac{3}{2}\)
A)11/15+5/7+2/7+4?15
=( 11/15+4/15)+(5/7+2/7)
=1+1
=2
B17/10+1/2-7/10
=17/10-7/10+1/2
=1+1/2
=3/2
k mik nha!
A)\(\frac{11}{15}+\frac{5}{7}+\frac{2}{7}+\frac{4}{15}\)
\(=\left(\frac{11}{15}+\frac{4}{15}\right)+\left(\frac{5}{7}+\frac{2}{7}\right)\)
\(=1+1\)
\(=2\)
b) \(\frac{17}{10}+\frac{1}{2}-\frac{7}{10}\)
\(=\frac{17}{10}-\frac{7}{10}+\frac{1}{2}\)
\(=1+\frac{1}{2}\)
\(=\frac{3}{2}\)
okey nha
nếu mk làm đúng thì hãy ủng hộ mk nha
a)11/15 + 5/7 + 2/7 + 4/15= (5/7 + 2/7)+(11/15 + 4/15)=1 + 1=2
b)17/10 + 1/2 - 7/10 = 17/10 - 7/10 + 1/2 = 1 + 1/2 = 3/2
A)11/15+5/7+2/7+4/15=(11/5+4/15)+(5/7+2/7)=1+1=2
B)17/10+1/2-7/10=(17/10-7/10)+1/2=1+1/2=3/2
a) \(\frac{11}{15}\)+ \(\frac{5}{7}\)+ \(\frac{2}{7}\)+ \(\frac{4}{15}\)
= \(\frac{77}{105}\)+ \(\frac{75}{105}\) + \(\frac{30}{105}\) + \(\frac{28}{105}\)
= \(\frac{210}{105}\) = \(2\)
11/15 + 5/7 +2/7 +4/15 =11/15 + 4/15 + 5/7 + 2/7 =1 +1 =2 17/10 +1/2 - 7/10 =17/10 - 7/10 +1/2 = 1 - 1/2 =1/2
b) \(\frac{17}{10}\) + \(\frac{1}{2}\) - \(\frac{7}{10}\)
= \(\frac{17}{10}\) + \(\frac{5}{10}\)+ \(\frac{-7}{10}\)
= \(\frac{15}{10}\) = \(\frac{3}{2}\)