(32+58)×8+8×9+8

= 8×(32+58+9+1)

= 8 × 100

= 800

(32 + 58) x 8 + 8 x9 + 8

= 8 x ( 32 + 58 + 9 +1 )

= 8 x 100 = 800.

Chúc Em Học Tốt

= 3/8 x (5/4 + 3/4)
= 3/8 x 8/4
= 3/8 x 2
= ...........

3/8x[5/4+3/4]

3/8x2

3/4

(13/17-5/17):8/3

=8/17:8/3

=3/17

=\(\dfrac{13}{17}:\dfrac{8}{3}-\dfrac{5}{17}:\dfrac{8}{3}\)

=\(\left(\dfrac{13}{17}-\dfrac{5}{17}\right):\dfrac{8}{3}\)

=\(\dfrac{8}{17}:\dfrac{8}{3}\)

\(=\dfrac{3}{17}\)

2/15 x 3/8 + 3/8 x 2/3 + 3/8 : 5

= 2/15 x 3/8 + 3/8 x 2/3 + 3/8 x 1/5

= 3/8 x ( 2/15 + 2/3 + 1/5 )

= 3/8 x 1

= 3/8

~ Hok tốt ~

#Minh#

\(\frac{2}{15}\cdot\frac{3}{8}+\frac{3}{8}\cdot\frac{2}{3}+\frac{3}{8}:5\)

\(=\frac{3}{8}\cdot\left(\frac{2}{15}+\frac{2}{3}+1\right):5\)

\(=\frac{3}{8}\cdot\frac{9}{5}:5=\frac{27}{100}\)

  13/8:5/6:3/5-2/3                      

=13/8x6/5x5/3-2/3

=13/8x[6/5x5/3]-2/3

=13/8x2-2/3

=13/4-2/3

=39/12-8/12

=31/12

= 3/7 nha

Ta có: \(\frac{13}{8}:\frac56:\frac35-\frac23\)

\(=\frac{13}{8}\times\frac65\times\frac53-\frac23\)

\(=\frac{13}{4}-\frac23\)

\(=\frac{39-8}{12}=\frac{31}{12}\)

\(=\left(\dfrac{3}{7}+\dfrac{8}{14}\right)+\left(\dfrac{3}{10}+\dfrac{7}{10}\right)=1+1=2\)

thack you

\(=\left(\dfrac{1}{3}:\dfrac{8}{3}\right)\times16=\dfrac{1}{8}\times16=\dfrac{16}{8}=2\)