a) (-124) + 24 = -100
b) 37. 78 + 37. 22
=  37 . ( 78 + 22 )
=  37 . 100
= 3700

tk cho mik nha

b: \(\dfrac{3}{4}-\dfrac{7}{15}+\dfrac{1}{4}+\dfrac{1}{2022}-\dfrac{8}{15}\)

\(=\left(\dfrac{3}{4}+\dfrac{1}{4}\right)-\left(\dfrac{7}{15}+\dfrac{8}{15}\right)+\dfrac{1}{2022}\)

\(=1-1+\dfrac{1}{2022}=\dfrac{1}{2022}\)

c: \(\dfrac{3}{5}\cdot\dfrac{4}{7}+\dfrac{3}{7}\cdot\dfrac{9}{5}+\dfrac{13}{7}\cdot\dfrac{2}{5}\)

\(=\dfrac{3}{5}\cdot\dfrac{4}{7}+\dfrac{3}{5}\cdot\dfrac{9}{7}+\dfrac{13}{7}\cdot\dfrac{2}{5}\)

\(=\dfrac{3}{5}\left(\dfrac{4}{7}+\dfrac{9}{7}\right)+\dfrac{13}{7}\cdot\dfrac{2}{5}\)

\(=\dfrac{3}{5}\cdot\dfrac{13}{7}+\dfrac{13}{7}\cdot\dfrac{2}{5}\)

\(=\dfrac{13}{7}\left(\dfrac{3}{5}+\dfrac{2}{5}\right)=\dfrac{13}{7}\)

\(=\dfrac{4}{5}\left(\dfrac{-11}{13}+\dfrac{-3}{5}\right)-\dfrac{1}{5}\\ =\dfrac{4}{5}\cdot\dfrac{-94}{65}-\dfrac{1}{5}=\dfrac{-144}{325}\)

\(=\dfrac{4}{5}.\left(\dfrac{-11}{13}+\dfrac{-2}{13}\right)-\dfrac{1}{5}\)

\(=\dfrac{4}{5}.\left(-1\right)-\dfrac{1}{5}\)

\(=\dfrac{-4}{5}-\dfrac{1}{5}\)

\(=-1\)

sai mog bạn thông cảm 

\(\dfrac{\dfrac{5}{3}-\dfrac{5}{7}+\dfrac{5}{9}}{\dfrac{10}{3}-\dfrac{10}{7}+\dfrac{10}{9}}=\dfrac{5\left(\dfrac{1}{3}-\dfrac{1}{7}+\dfrac{1}{9}\right)}{10\left(\dfrac{1}{3}-\dfrac{1}{7}+\dfrac{1}{9}\right)}=\dfrac{1}{2}\)

thank you

17² - 17 + 17.84

= 17.(17 - 1 + 84)

= 17.100

= 1700

=17. (17-1+84)

=17.100

=1700

e: =5/7(5/11+2/11-14/11)

=5/7(-7/11)=-5/11

f: =-5/4(2/11+9/11)+1+3/4

=-5/4+7/4

=2/4=1/2

g: =-5/7(3/13+10/13)+1+5/7

=-5/7+1+5/7

=1

h: =7/4(29/5-9/5)+41/13

=-7+41/13=-50/13

− 5 12 − − 3 24 = − 5 12 + 3 24 = − 10 24 + 3 24 = − 7 24

5 5 13 − 1 1 2 + 3 5 13 = 5 5 13 − 1 1 2 − 3 5 13 = 5 5 13 − 3 5 13 − 1 1 2 = 2 − 3 2 = 1 2