a. 32 + (–49) – |–15|

= 32 - 49 - 15 

= -32

b. (–12) – 80 : (–16) + (–25) . (–3) 

= - 12 + 5 + 75

= 68

c. 17 – 15 . (–2)² – 144 : |–16|

= 17 - 15.4 - 144 : 16

= 17 - 60 - 9

= -52

a, 32 + (-49) -|-15|

= -17 - 15

= -32

b, (-12) - 80 : (-16) + (-25) . (-3)

= (-12) - (-5) + 75

= -7 + 75

= 68

c, 17 - 15 . (-2)2 - 144 :|-16|

= 17 - 15. 4 - 144 : 16

= 17 - 60 - 9

= -43 - 9

= -52

d, -35 . 54 + 32.(-63) - 32(-17)

= -1890 + 32. [-63 - (-17)]

= -1890 + 32. (-46)

= -1890 + (-1472)

= -3362.

Tham khảo nha!!!

\(=\left(\frac{35}{17}-\frac{18}{17}\right)-\frac{42}{16}+\frac{26}{16}\)

\(=1-\left(\frac{42}{16}-\frac{26}{16}\right)\)

\(=1-1\)

\(=0\)

35 / 17 - 84 / 32 - 18 / 17 + 26 / 16

= ( 35 / 17 - 18 / 17 ) - ( 21 / 8 - 13 / 8)

= 1 - 1

= 0 

34 + 35 +36 + 37 - 14 - 15 -16 - 17

=(34-14)+(35-15)+(36-16)+(37-17)

=20+20+20+20

=20.4

=80 *nhớ tick mk nha*

34 + 35 + 36 + 37 - 14 - 15 - 16 - 17

= (34 - 14) + (35 - 15) + (36 - 16) + (37 - 17)

= 20 + 20 + 20 + 20

= 80

34+35+36+37-14-15-16-17
=(37-17)+(36-16)+(35-15)+(34-14)
=20+20+20+20
=80

=23x145-17x23-145x17

=145x(23-17)-17x23

=145x6-17x23

Đến đây thì mình chịu bạn tự tính tay nhé

=870-391

=479

\(23.\left(145-17\right)-145.\left(23-6\right)\)

\(=23.145-23.17-145.23+145.6\)

\(=\left(23.145+145.6\right)-\left(145.23+23.17\right)\)

\(=145.\left(23+6\right)-23.\left(145+17\right)\)

\(=145.29-23.162\)

\(=479\)

a) 126 x 22 + 78 x 126 = 126 x ( 22 + 78 )

                                  = 126 x 100

                                  = 12600.

b) 225 x 17 - 17 x 125 = ( 225 - 125 ) x 17

                                 = 100 x 17

                                 = 1700.

a) 126 x 22 + 78 x 126 = 126 x ( 22 + 78 )

  = 126 x 100

  = 12600.

b) 225 x 17 - 17 x 125 = ( 225 - 125 ) x 17

 = 100 x 17

    = 1700

k mk nha 

a)126 x 22 + 78 x 126 = 126 x (22 + 78)

                                 = 126 x     100

                                 =      12600

b)225 x 17 - 17 x 225 = 225 x (17 - 17)

                                = 225 x      0

                                =       0

1+6+11+16+...+46+51

(51+1).((51-1):5+1):2

=52.5,5

=286

17(15-16)+16(17-20)

= 17. (-1) + 16.3

= -17 + 48

= 31