1 + 1 = 2

3 + 3 = 6

5 + 5 = 10

1 + 0 = 1

99 + 1 = 100

9 + 1 = 10

5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 5 + 5 + 5 + 7 + 7 + 7 = 88

k mk nha

2

6

10

1

100

10

83

\(3+\frac{2}{5}-\frac{3}{4}\times\frac{4}{5}\)

\(=3+\frac{2}{5}+\frac{3}{5}\)

\(=3+1\)

\(=4\)

Câu 1\(\frac{9}{8}.\frac{9}{3}=\frac{81}{24}\)

Câu 2 \(\frac{19}{5}+\frac{9}{5}=\frac{28}{5}\)

Câu 3 \(\frac{31}{7}:\frac{22}{5}=\frac{31.5}{7.22}=\frac{155}{154}\)

Câu 4 \(\frac{12}{1}-\frac{31}{5}=\frac{60}{5}-\frac{31}{5}=\frac{29}{5}\)

ai k mình mình k lại

a) \(\frac{3}{5}+\frac{6}{11}+\frac{7}{13}+\frac{5}{11}+\frac{2}{5}+\frac{19}{13}=\left(\frac{3}{5}+\frac{2}{5}\right)+\left(\frac{6}{11}+\frac{5}{11}\right)+\left(\frac{7}{13}+\frac{19}{13}\right)=1+1+2=4\)

b) \(\frac{6}{5}\times\frac{3}{8}+\frac{5}{8}\times\frac{6}{5}-\frac{4}{5}=\frac{6}{5}\times\left(\frac{3}{8}+\frac{5}{8}\right)-\frac{4}{5}=\frac{6}{5}-\frac{4}{5}=\frac{2}{5}\)

c) \(\frac{4\times5\times6\times7\times8}{8\times10\times12\times14\times16}=\frac{1}{2\times2\times2\times2\times2}=\frac{1}{32}\)

a, \(\frac{3}{5}+\frac{6}{11}+\frac{7}{13}+\frac{6}{11}+\frac{2}{5}+\frac{19}{13}\)

\(=\left(\frac{3}{5}+\frac{2}{5}\right)+\left(\frac{7}{13}+\frac{19}{13}\right)+\left(\frac{6}{11}+\frac{6}{11}\right)\)

\(=1+2+\frac{12}{11}\)

\(=3+\frac{12}{11}\)

\(=\frac{45}{11}\)

\(3+\frac{2}{5}-\frac{3}{4}\)X \(\frac{4}{5}\)

\(=\frac{3}{1}+\frac{2}{5}-\frac{3}{5}\)

\(=\frac{17}{5}-\frac{3}{5}\)

\(=\frac{14}{5}\)

\(3+\frac{2}{5}-\frac{3}{4}\times\frac{4}{5}\)

\(=3+\frac{2}{5}-\frac{3}{5}\)

\(=3+\frac{-1}{5}\)

\(=\frac{15}{5}+\frac{-1}{5}\)

\(=\frac{14}{5}\)

= 2/21

=9/5

=37/6:\(6\frac{1}{6}\)

=79/20: tự đổi nhe bạn

=3/5__________-

\(\frac{4}{15}x\frac{5}{14}=\frac{4x5}{15x14}=\frac{2x1}{3x7}=\frac{2}{21}\)

\(\frac{3}{4}:\frac{5}{12}=\frac{3}{4}x\frac{12}{5}=\frac{3x12}{4x5}=\frac{3x3}{1x5}=\frac{9}{5}=1,8\)

\(\frac{7}{2}+\frac{8}{3}=\frac{7x3}{2x3}+\frac{8x2}{3x2}=\frac{21}{6}+\frac{16}{6}=\frac{21+16}{6}=\frac{37}{6}\)

Lần sau chú ý đăng đúng môn học nha.

\(a,3^4.3^5.3^6=3^{\left(4+5+6\right)}=3^{15}\)

\(b,5^2.5^4.5^5.25=5^2.5^4.5^5.5^2=5^{\left(2+4+5+2\right)}=5^{13}\)
\(c,10^8:10^3=10^8.\dfrac{1}{10^3}=10^5\)

\(d,a^7:a^2=a^7.\dfrac{1}{a^2}=\dfrac{a^7}{a^2}=a^5\)

a) 3⁴⁺⁵⁺⁶ = 3¹⁵ 

b) ( 25 = 5² ) 5^2+4+5+2 = 5¹³

c) 10^8-3 = 10⁵

d) a^7-2 = a⁵

\(14.\frac{5}{21}=\frac{14}{1}.\frac{5}{21}=\frac{14.5}{21}=\frac{10}{3}\)

\(\frac{5}{21}.14=\frac{5.14}{21.1}=\frac{5.2}{3.1}=\frac{10}{3}\)

\(10:\frac{5}{3}=10.\frac{3}{5}=\frac{10.3}{5}=2.3=6\)

\(\frac{5}{3}:10=\frac{5}{3}.\frac{1}{10}=\frac{5}{3.10}=\frac{1}{6}\)

a) \(\frac{5}{6}< \frac{6}{7}\)

b) \(\frac{5}{8}=\frac{50}{80}\)

c) \(\frac{3}{4}>\frac{5}{7}\)

d) \(\frac{9}{7}< \frac{8}{5}\)

a) <

b) =

c) >

d) <

ủng hộ mk nha

\(\frac{65}{12}\)nha bạn

\(10101\times\left(\frac{5}{10101}-\frac{5}{20202}+\frac{5}{30303}+\frac{5}{40404}\right)\)

\(=10101\times\left(\frac{10}{20202}-\frac{5}{20202}+\frac{20}{121212}+\frac{15}{121212}\right)\)

\(=10101\times\left(\frac{5}{20202}+\frac{25}{121212}\right)\)

\(=10101\times\frac{55}{121212}\)

\(=\frac{65}{12}\)