Q=(1/99+12/999+123/999)x(1/6-1/6)

Q=(1/99+12/999+123/999)x0

Q=0

học tốt!

A=(1/99+12/999+123/999)x(1/2-1/3-1/6)

=(1/99+12/999+123/999)x(3/6-2/6-1/6)

=(1/99+12/999+123/999)x0

=0

a)66-x=44

=>x=66-44

=>x=22

vậy x=22

b)78+x=123

=>x=123-78

=>x=45

vậy x=45

c)123-x=34

=>x=123-34

=>x=89

vậy x=89

d)999+x=1000

=>x=1000-999

=>x=1

vậy x=1

k mình nha

a.22

b.45

c.89

d.1

a. 66 - x = 44

x = 66- 44 

x = 22

b. 78 + x = 123

x = 123 - 78

x = 45

c. 123 - x = 34

x = 123 - 34

x = 89

d. 999 + x = 1000

x = 1000 - 999

x = 1

x + 999 - 123 = 1999

x + 999 = 1999 + 123

x + 999 = 2122

          x = 2122 - 999

          x = 1123

X + 999 = 1999 + 123

X+999 = 2122

X= 2122 - 999

X= 1123

x+999=1999+123

x+999=2122

x=2122-999

x=1123

999 x 999 = 998001

124 x 765 = 94860

dùng mt nhá bro

1)

= 333 . ( 123 + 234 + 1)

= 333 . 358

= 119214

2)

= 777 . ( 783 + 999 )

= 777 . 1782

=  1384614

123 x 333 + 333 x 234 + 333

= 123 x 333 + 333 x 234 + 333 x 1

= 333 x ( 123 + 234 + 1 )

= 333 x       258

=     119214

783 x 777 + 999 x 777

= 777 x ( 783 + 999 )

= 777 x    1782

=       1384614

123 x 333 + 333 x 234 + 333

=123 x 333 + 333 x 234 + 333 x 1

=(123 + 234 + 1) x 333

=358 x 333

=119214

783 x 777 + 999 x 777 

=(783 + 999) x 777

=1384614