Question

tính các tổng sau 1 cách thích hợp

2575+37-2576-29

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

 

Answer 1

2575+37-2576-29=(2575-2576)+(37-29)=-1+8=8-1=7

34+35+36+37-14-15-16-17=(34-14)+(35-15)+(36-16)+(37-17)=20+20+20+20=20.4=80

k cho mình nhá

Answer 2

a/2575+37-2576-29

= (2575-2576)+(37-29)

= -1+8

= 7

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

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

=20+20+20+20

=80

Answer 3

7 và 80 k cho mk nha

Answer 4

2575+37-2576-29

=(2575-2576)+(37-29)

=-1+8=7

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

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

=20+20+20+20

=20.4=80

Answer 5

2575+37-2576-29

= (2575-2576)+(37-29)

=-1+8=7

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

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

=20+20+20+20

=80

Answer 6

2575+37-2576-29

= (2575-2576)+(37-29)

=-1+8=7

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

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

=20+20+20+20

=80

Answer 7

2575+37-2576-29

= (2575-2576)+(37-29)

=-1+8=7

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

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

=20+20+20+20

=80

Answer 8

 a ) 2575 + 37 - 2576 -29 =2575 +37 +( - 2576 ) + ( -29 ) = [ 2575 + ( - 2576 ) ] + [ 37 + ( -29 ) ]=( - 1 ) + 8= 7

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

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