(-26) + 16 + (-34) + 26          

`=(-26+26)+[16+(-34)]`

`=0+(-18)`

`=-18`                         

\((-26) + 16 + ( - 34) + 26 \)

\(=-26+16-34+26\)

\(=(26-26)+(16-34)\)

\(=0-18\)

\(=-18\)

(-26) + 16 + (-34) + 26          

a,   72 - 20 + 135        b, (-26) + 16 + (-34) + 26          c, 24.82 + 24.18 - 100

=  52 + 135                    =( -26 + 26) - ( 34 - 16)           =   24. ( 82 + 18) - 100

= 187                            = 0 - 18                                    = 24 . 100 - 100

                                    = -18                                      =   100.( 24 - 1)

                                                                                   = 2300

\(b,\left(-26\right)+16+\left(-34\right)+26=\left(-10\right)+\left(-8\right)=-18\\ c,12+3.\left[39-\left(5-2\right)^2\right]\\ =12+3.\left[39-3^2\right]\\ =12+3.\left[39-9\right]\\ =12+3.30\\ =12+90=102\)

b) (-26)+16+(-34)+26

=16-34

=-18

c)12+3[39-(5-2)²]

=12+3[39-(25-20+4)]

=12+3[39-9]

=12+3.30

=12+90

=102

\(26+\left(-16\right)+\left(-34\right)+26\)

\(=26+\left[\left(-16\right)+\left(-34\right)\right]\)

\(=26+\left(-50\right)\)

\(=-24\)

\(12+3.\left[39-9\right]\)

\(=12+3.30\)

\(=12+90\)

\(=102\)

hừm

c) (-37) – 14 – 26 + 37=(-37)+37-14-26=0-(-12)=12
d) 34 + 35 + 36 + 37 – 14 – 15 – 16 – 17 =(34-14)+(35-15)+(36-16)+(37-17)=20+20+20+20=80

\(\dfrac{4}{1.3}+\dfrac{12}{3.9}+\dfrac{16}{9.17}+\dfrac{30}{17.32}+\dfrac{26}{32.45}+\dfrac{10}{45.50}+\dfrac{34}{50.67} =2.\left(\dfrac{2}{1.3}+\dfrac{6}{3.9}+\dfrac{8}{9.17}+\dfrac{15}{17.32}+\dfrac{13}{32.45}+\dfrac{5}{45.50}+\dfrac{17}{50.67}\right)=2\left(\dfrac{1}{1}-\dfrac{1}{3}+\dfrac{1}{3}-\dfrac{1}{9}+\dfrac{1}{9}-\dfrac{1}{17}+...\dfrac{1}{45}-\dfrac{1}{50}+\dfrac{1}{50}-\dfrac{1}{67}\right)=2\left(1-\dfrac{1}{67}\right)=2.\dfrac{66}{67}=\dfrac{132}{67}\)

a) =-46
b) =0
c) =-2021
d) =-2400

a. -46

b. 0

c. 2021

d. -2400

(-26)+16+(-34)+24

=[(-26)+(-34)]+(16+24)

=(-60)+40

=-20

Hok tốt!

( -26 ) + 16 + ( -34 ) + 24

= [ ( -26 ) + 16 ] + [ ( -34 ) + 24 ]

= ( -10 ) + ( -10 )

= -20.

#Y/n