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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 - 5674 - 97
= -97
b. (-1075) - (29 - 1075)
= -1075 + 1075 - 29
= -29
( - 1075 ) - ( 29 - 1075 )
= - 1075 - 29 + 1075
= ( - 1075 + 1075 ) - 29
= 0 - 29
= - 29
a, ( - 168 ) + 72 . ( - 168 ) + ( - 168 ) . 27
= ( - 168 ) + ( - 12096 ) + ( - 4536 )
= - 12264 + - 4536
= - 16800
b, 22 . ( - 3 ) - ( 110 + 8 ) : ( - 3 )2
= 4 . ( - 3 ) - ( 1 + 8 ) : 9
= ( - 12 ) - 9 : 9
= ( - 12 ) - 1
= - 13
c, ( - 1075 ) - ( 29 - 1075 )
= ( - 1075 ) - ( - 1046 )
= - 29
d, ( - 9 ) + ( - 11 ) + 21 + ( - 1 )
= - 20 + 21 + ( - 1 )
= 1 + - 1
= 0
e, 30 + 12 + ( - 20 ) + ( - 12 ) - ( 30 - 20 ) + ( 12 - 12 )
= 42 + ( - 20 ) + ( - 12 ) - 10 + 0
= 22 + ( - 12 ) - 10 + 0
= 10 - 10 + 0
= 0 + 0
= 0
g, ( 13 - 135 + 49 ) - ( 13 + 49 )
= [( - 122 ) + 49 ] - 62
= ( - 73 ) - 62
= - 135
h, 35 - { 12 - [ ( - 14 ) + ( - 2 ) } ]
= 35 - { 12 - ( - 16 ) }
= 35 - 28
= 7
Bài 2:
a. x - 35 = ( - 12 ) - 3
x - 35 = - 15
x = - 15 + 35
x = 20
b, \(\frac{1}{4}\)+ \(\frac{1}{3}\): 3x = - 5
\(\frac{3}{12}+\frac{4}{12}\): 3x = - 5
\(\frac{7}{12}\): 3x = - 5
3x = \(\frac{7}{12}\): - 5
3x = \(\frac{-7}{60}\)
x = \(\frac{-7}{60}\): 3
x = \(\frac{-7}{180}\)
c,2x-1 = 8
2x-1 = 24
x = 4 + 1
x = 5
a) ( 5674 - 97 ) - 5674
= ( 5674 - 5674 ) - 97
= 0 - 97
= -97
a) 2575 + 37 - 2576 - 39
= 2576 + 36 - 2576 - 29
= 36 - 29
= 7
b) 34 + 35 + 36 + 37 - 14 - 15 - 16 - 17
= (34 - 14) + (35 - 15) + (36 - 16) + (37 - 17)
= 20 + 20 + 20 + 20
= 20 . 4
= 80
(-1075) – (29 – 1075) = (-1075) – 29 + 1075
= (-1075 + 1075) – 29 = 0 -29 = -29