\(98.7676-9898.76=98.101.76-98.101.76=0\)

Vậy thương trên bằng 0

( 98 . 7676 - 9898 . 76 ) : ( 2001 . 2002 . 2003....2018 )

= ( 98 . 76 . 101 - 98 . 101 . 76 ) : ( 2001 . 2002 . 2003....2018 )

= 0 : ( 2001 . 2002 . 2003....2018 )

= 0

help my

a; 2³.17 + 2³.83 - 14

= 2³.(17 + 83) - 14

= 8.100 - 14

= 800 - 14

= 786 

b; -176 + 197 - (-76 + 97)

= -176 + 197 + 76 - 97

= -(176 - 76) + (197 - 97)

= - 100 + 100

= 0 

c; 2022 - [45 - (6 - 1)² ] + 2021⁰

= 2022 - [45 - 5²] + 1

= 2022 + 1 - [45 - 25] 

= 2023 - 20

= 2003

a) \(2^3.17+2^3.83-14\)

\(=2^3.\left(17+83\right)-14\)

\(=8.100-14\)

\(=800-14\)

\(=786\)

b) \(-176+197-\left(-76+97\right)\)

\(=-176+197+76-97\)

\(=\left(-176+76\right)+\left(197-97\right)\) 

\(=-100+100\)

\(=0\)

c) \(2022-\left[45-\left(6-1\right)^2\right]+2021^0\)

\(=2022-\left[45-5^2\right]+1\)

\(=2022-\left[45-25\right]+1\)

\(=2022-20+1\)

\(=2002+1=2003\)

1a) -54 . 76 + 12 .(-76) + 76.(-34)

= (-54 - 12 - 34).76

= -100 . 76

= -176

b) 37.(63 - 24) - 63.(24 + 37)

= 37 . 63 - 37 . 24 - 63.24 - 63 . 37

= (37.63 - 63.37) - (37 + 63) . 24

= 0 - 100 . 24

= - 2400

2a) x + (-27) = -23 - x

=> x + x = -23 + 27

=> 2x = 4

=> x = 4 : 2

=> x = 2

b) xy + 2x - y = 15

=> x(y + 2) - y = 15

=> x(y + 2) - (y + 2) = 13

=> (x - 1)(y + 2) = 13 = 1 . 13 = 13 . 1

Lập bảng :

Vậy ...

-(127+38-21)-(121-27+48)+50

=-127-38+21-121+27-48+50

=(-127+27)-(38+48)+(21-121)+50

=-100-86-100+50

=-(100+100+86)+50

=-286+50

=-236

-39+(193-127+96)-(193+196-127)

=-39+193-127+96-193-196+127

=-39+(193-193)-(127+127)+(96-196)

=-39-100

=-139

\(-121:\frac{1}{25}-25.\left(-76\right)+1-551.25\)

\(=-121.25-25.\left(-76\right)+1-551.25\)

\(=25.\left(-121+76-551\right)+1\)

\(=25.\left(-596\right)+1\)

\(=-14900+1\)

\(=-14899\)

Sao số to v ?

\(34\times76+66\times110+34\times34\)

\(=34\times\left(76+34\right)+66\times110\)

\(=34\times110+66\times110=110\times\left(34+66\right)=110\times100=110000\)

34 x 76 + 66 x 110 + 34 x 34

= 34 x ( 76 + 34 ) + 66 x 110

= 34 x 110 + 66 x 110

= 110 x ( 34 + 66 )

= 110 x 100

= 11 000

=))

34 x 76 + 66 x 110 + 34 x 34

= 34 x ( 76 + 34 ) + 66 x 110

= 34 x 110 + 66 x 110

= 110 x ( 34 + 66 )

= 110 x 100 

= 110000

Study well 

Bạn k k lên điểm đâu lên mk k cần đâu ạ 

=54.(-76)+12.(-76)-(-76).34

=(-76).(54+12-34)

=-76.32

=-2432

-54.76+12.(-76)-76.(-34)

=(-54).76+(-12).76-76.(-34)

=76 [(-54)+(-12)-(-34)]

=76 (-32)

= -2432

=54.(-76)+12.(-76)-(-76).34

=(-76).(54+12-34)

=76.32

=2432

7⁸ :7⁶ + 4.4² - 13 
= 7² + 4³ - 13
= 49 + 64 - 13
= 113 - 13
= 100

\(1-2+3-4+...+199-200\)

\(=\left(1-2+3-4\right)+\left(5-6+7-8\right)+...+\left(197-198+199-200\right)\) ( 50 cặp )

\(=-2\times50\)

\(=-100\)
 

Ta có :\(274.24+76.312+24.226+188.76=24.\left(274+226\right)+76.\left(312+188\right)\)

\(=24.500+76.500\)

\(=500.\left(24+76\right)\)

\(=500.100\)

\(=50000\)

Bài này trong sách giáo khoa dễ mà bạn

=(274+226)x24+(188+312)x76

= 500        x24+  500       x76

= 500x(24+76)

= 500x100

=50 000

 274. 24 + 76. 312 + 24. 226 + 188. 76

= 24. ( 274 + 226 ) + 76. ( 312 + 188 )

= 24. 500 + 76. 500

= 500. ( 24 + 76 )

= 500. 100

=50000

-Học tốt ! -