a) -97

b) -29

Bấm đúng nha , mình là người đầu tiên nè

a. (5674 - 97) - 5674

= 5674 - 5674 - 97

= -97

b. (-1075) - (29 - 1075)

= -1075 + 1075 - 29

= -29

a) (5674-97) - 5674

= (5674-5674)-97

= 0-97

= -97

b) (-1075) - (29-1075)

= -1075 - 29 + 1075

= (-1075+1075) - 29

= 0 - 29

= -29

a, \(\left(5674-97\right)-5674\)

\(=\left(5674-5674\right)-97\)

\(=0-97=-97\)

b,\(\left(-1075\right)-\left(29-1075\right)\)

=\(-1075-29+1075\)

\(=\left(-1075+1075\right)-29\)

\(=0-29=-29\)

a) ( 5674 - 97 ) - 5674

= 5674 - 97 - 5674

= 5674 - 5674 - 97

= -97

b) ( - 1075) - ( 29 - 1075)

= - 1075 - 29 + 1075

= - 1075 + 1075 - 29

= 0 - 29

= 29

a) ( 5674 - 97 ) - 5674

= ( 5674 - 5674 ) - 97

= 0 - 97

= -97

a) \(\left(5674-97\right)-5674\)

\(=5674-97-5674\)

\(=\left(5674-5674\right)-97\)

\(=0-97\)

\(=-97\)

b) \(\left(-1075\right)-\left(29-1075\right)\)

\(=\left(-1075\right)-29+1075\)

\(=\left[\left(-1075\right)+1075\right]-29\)

\(=0-29\)

\(=-29\)

a) \(\left(5674-97\right)-5674=5674-97-5674=\left(5674-5674\right)-97=-97\)

b) \(\left(-1075\right)-\left(29-1075\right)=-1075-29+1075=\left(-1075+1075\right)-29=-29\)

\((5674-97)+(97+18-5674)\)

\(=5674-97+97+18-5674\)

\(=(5674-5674)+(-97+97)+18\)

\(=0+0+18\)

\(=18\)

5674-97+97+18-5674=18

5674-97+97+18-5674=18

a,\(\left(5674-97\right)-5674=5674-97-5674=\left(5674-5674\right)-97=-97\)

b,\(-1075-\left(29-1075\right)=-1075-29+-1075=\left(-1075+1075\right)-29=-29\)c

\(\left(13-135+49\right)-\left(13+49\right)=13-135+49-13-49=-135\)

Nếu thấy mình làm đúng thì tick nha bạn,cảm ơn.

a. x+25+(-17)+63

= x+8+63

= x+71

b.-75-(P+20)+95

= -75-p-20+95

= -p-75+75

= -p

bài 3 :a.(5674-97)-5674

= (5674-5674)-97

=-97

b.(-1057)-(29-1057)

= (-1057+1057)-29

= -29

a, (-8)-(-12-8)=(-8)+12+8= [(-8)+8}]+12= 0+12=12

b, 1765-(312+1765)= 1765-312-1765=(1765-1765)-312=0-312=-312

c. (31-12)-(46+31-12)= 31-12+46-31+12= (31-31)+(12-12)+46=0+0+46=46

d, (5674-97)-5674=5674-97-5674=(5674-5674)-97=0-97=-97

e, (-1075)-(29-1075)=(-1075)+29+1075=[(-1075)+1075]+29=0+29=29

g, (18+29)+(158-18-29)=18+29+158-18-29=(18-18)+(29-29)+158=0+0+158=158

h, (13-135+49)-(13+49)=13-135+49-13-49=(13-13)+(49-49)-135=0+0-149=0-149=-149

1a: 16

1. Tính tổng

a) ( - 24 ) + 6 + 10 +24

= [ ( -24 ) + 24 ] + ( 6 + 10)

= 0 + 16

= 16

b) 15 + 23 + ( - 25 ) + ( - 23 )

= (15 + 25 ) + [23 + ( -23 ) ]

= 40 + 0

= 40

c) ( - 3 ) + ( - 350 ) + ( - 7 ) + 350

= [ ( -3 ) + ( -7 ) ] + [ ( -350 ) + 350 ]

= -10 + 0

= -10

d)  ( - 9 ) + ( - 11 ) + 21 + ( - 1 )

= [ (-9) + (-1) ] + [ (-11) + 21 ]

= -10 + 10

= 0

2. Đơn giản biểu thức 

a) x + 25 + ( - 17 ) + 63

= x + ( 25 - 17 + 63 )

= x + 71

b)  ( - 75 ) - ( p + 20 ) + 95

= -75 - p - 20 + 95

= ( -75 - 20 + 95 ) - p

= 0 - p

= -p

3. Tính nhanh các tổng sau

a) ( 5674 - 97 ) - 5674

= 5674 - 94 - 5674

= ( 5674 - 5674 ) -94

= 0 - 94

= -94

b) (- 1075 ) - ( 29 - 1075 )

=-1075 - 29 + 1075

= ( -1075 + 1075 ) - 29

= 0 - 29

= -29

4. Bỏ dấu ngoặc rồi tính 

a )  ( 18 + 29 ) + ( 158 - 18 - 29 )

= 18 + 29 + 158 - 18 - 29

= ( 18 - 18 ) + ( 29 - 29 ) + 158

= 0 + 0 + 158

= 158

b )   ( 13 - 135 + 49 ) - ( 13 + 49 )

= 13 - 135 + 49 - 13 - 49

= ( 13 - 13 ) + ( 49 - 49 ) - 135

= 0 + 0 - 135

= -135

a)(-24)+6+10+24

=0+6+10

=16

b)15+23+(-25)+(-23)

=0+0

=0

c)(-3)+(-350)+(-7)+350

=0+(-3)+(-7)

=0