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 ! -

\(76.\left(-42\right)+76.\left(-14\right)+24.\left(-56\right)\)

\(=76.\left(-42+-14\right)+24.\left(-56\right)\)

\(=76.\left(-56\right)+24.\left(-56\right)\)

\(=\left(76+24\right).-56\)

\(=100.-56\)

\(=-5600\)

\(76\left(-42\right)+76\left(-14\right)+24\left(-56\right)\)

\(=76\left[\left(-42\right)+\left(-14\right)\right]+24\left(-56\right)\)

\(=76.\left(-56\right)+24.\left(-56\right)\)

\(=\left(-56\right)\left(76+24\right)\)

\(=\left(-56\right)100=-5600\)

giúp mình với

45 . 76 + 24 . 175 – 24 . 130

= 45 . 76 + 24. ( 175 - 130 )

= 45 . 76 + 24 . 45

= 45 . (76 + 24)

= 45 . 100

= 4500

# HOK TỐT #

 45 . 76 + 24 . 175 – 24 . 130

= 45 . ( 76 + 175 - 24 )

= 45 . 227

= 10215

\(a,30\cdot6+30\cdot71+20\cdot30\)

=\(30\cdot\left(6+71+20\right)\)

=\(30\cdot97=2910\)

\(b,24\cdot\left(31+119\right)+76\cdot\left(29+121\right)\)

=\(24\cdot150+76\cdot150\)

=\(150\cdot\left(24+76\right)\)

=\(150\cdot100\)

=\(15000\)

\(c,87\cdot23+70\cdot87+43\cdot93\)

=\(87\cdot\left(23+87\right)+43\cdot93\)

=\(87\cdot110+3999\)

=\(9570+3999\)

=13569

a) 15 . 6 . 2 + 3 . 71 . 10 + 20 . 30 

= ( 15 . 2 ) . 6 + ( 3 . 10 ) . 71 + 20 . 30

= 30 . 6 + 30 . 71 + 20 . 30 

= 30 . ( 6 + 71 + 30 ) 

= 30 . 107

= 3210

b) 24 . 31 + 24 . 119 + 76 . 29 + 76 . 121 

= 24 . ( 31 + 119 ) + 76 . ( 29 + 121 )

= 24 . 150 + 76 . 150 

= 150 . ( 24 + 76 ) 

= 150 . 100 

= 15 000

c) 87 . 23 + 43 . 93 + 70 . 87 

= 87 . 23 + 70 . 87 + 43 . 93 

= 87 . ( 23 + 70 ) + 43 . 93 

= 87 . 93 + 43 . 93 

= 93 . ( 87 + 43 ) 

= 93 . 130 

= 12 090

a) 15 . 6 . 2 + 3 . 71 . 10 + 20 . 30

= 30 . 6 + 30 . 71 + 30 . 20

= 30 . (6 + 71 + 20) = 30 . 97 = 2910

b) 24 . 31 + 24 . 119 + 76 . 29 + 76 . 121

= 24 . (31 + 119) + 76 . (29 + 121)

= 24 . 150 + 76 . 150 = 150 . (24 + 76)

= 150 . 100

= 15000

c) 87 . 23 + 43 . 93 + 70 . 87

= 43 . 93 + 87 . (23 + 70)

= 43 . 93 + 87 . 93

= 93 . (43 + 87)

= 93 . 130

= 12090

-100

-100

- 100

a,= 32.(11+67) +78.68

      32.78+78.68

      78.(32+68)

      78.100

      = 7800

b,76.(41-20)+21.24

   =76.21+21.24

   =21.(76+24)

   =21.100

   =2100

  -76+(-24)

=-100

Nhưng lớp 6 mới học SỐ ÂM nhaaaaaaaaaa

-100 nha bạn

-76 + -24 = -100