2 + 3 + 3 + 5 + 6 + 9 - 2 -4 -1 + 3 + 6 = 30

= 30 k mình nha

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 × 10

= 36 + 90

= 126

450

5+1+5+3+6+79+6

= (5+5) + (6+3 +6) + (79+1)

= 10 + 15 + 80

= 105.

Chúc bạn học tốt !

kết quả bằng 105 nka

9 nha ban

ung ho nha

1+4-2+5-3+6-9+6-5+4-7+8-3+5-1=9

ủng hộ nha

mình nghĩ = -2525

ai biet giai nhanh ma ro ra nhe

110 nhé bạn!

= 110

k mk đi nha

= \(\frac{1}{2}\)- \(\frac{2}{3}\)+ (\(\frac{3}{4}\)- \(\frac{3}{4}\)) + ( -\(\frac{4}{5}\)+ \(\frac{4}{5}\)) + ( \(\frac{5}{6}-\frac{5}{6}\)) - \(\frac{6}{7}\)

= \(\frac{1}{2}-\frac{2}{3}-0-0-0-\frac{6}{7}\)

= \(\frac{1}{2}-\frac{2}{3}-\frac{6}{7}\)

=\(\frac{21}{42}-\frac{28}{42}-\frac{36}{42}\)

= \(\frac{-43}{42}\)

hjjjjhhbnjbbhhbbb

\(\frac{3}{4}x\frac{4}{5}:\frac{3}{5}x\frac{6}{7}:\frac{1}{7}x\frac{5}{6}\)\(=\)\(\frac{3}{4}x\frac{4}{5}x\frac{5}{3}x\frac{6}{7}x\frac{7}{1}x\frac{5}{6}\)\(=\)\(\frac{3x4x5x6x7x5}{4x5x3x7x1x6}\)\(=\)\(\frac{\left(3\right)x\left(4\right)x\left(5\right)x\left(6\right)x\left(7\right)x5}{\left(3\right)x\left(4\right)x\left(5\right)x\left(6\right)x\left(7\right)x1}\)\(=\)\(\frac{5}{1}\)\(=\)\(5\).

5

     2 + \(\dfrac{5}{6}\): 3 

=   2 + \(\dfrac{5}{6}\) : \(\dfrac{3}{1}\)

=   2 + \(\dfrac{5}{6}\) \(\times\) \(\dfrac{1}{3}\)

=   2 + \(\dfrac{5}{18}\)

= \(\dfrac{2\times18}{18}\) + \(\dfrac{5}{18}\)

= \(\dfrac{36}{18}\) + \(\dfrac{5}{18}\)

= \(\dfrac{41}{18}\)

17/18 đúng không