giải giùm mình nhen mn. lu

\(a,\left(25\times32\right):8=25\times\left(32:8\right)=25\times4=100\\ b,\left(56\times125\right):7=\left(56:7\right)\times125=8\times125=1000\)

a) 36 x 25 x 4 = 36 x ( 25 x 4) = 36 x 100 = 3600

18 x 24 : 9= 24 x ( 18:9) = 24 x 2 = 48

41 x 2 x 8 x 5= 41 x 8 x ( 5x2) = 41 x 8 x 10 = 3280

b) 108 x (23 + 7)= 108 x 30 = 3240 

215 x 86 + 215 x 14 = 215 x ( 86 + 14) = 215 x 100 = 21500 

53 x 128 – 43 x 128= 128 x ( 53 - 43) = 128 x 10 = 1280

ko thể nào mà cản bước dc Mi cha e =))

(36 + 54) × 7 + 7 × 9 + 7

= 90 × 7 + 7 × 9 + 7

= (90 + 9 + 1 ) × 7

= 100 × 7

= 700

A = 700

`=1,25xx(1+2+7)=1,25xx10=12,5`

a) = 1,25 x ( 2 + 7 + 1 )

= 1,25 x 10

= 12,5

a: \(828\times22+828\times34+828\times44\)

\(=828\times\left(22+34+44\right)\)

=828x100

=82800

b: \(462\times483-462\times83\)

\(=462\times\left(483-83\right)\)

\(=462\times400=184800\)

c: \(74\times8+74\times2\)

=74x(8+2)

=74x10

=740

d: 243x45+243x55

=243x(45+55)

=243x100

=24300

e: 87x2+87x3+87x5

=87x(2+3+5)

=87x10

=870

f: 168x4+168x3+168x2

=168x(4+3+2)

=168x9

=1512

g: 234x135-234x35

=234x(135-35)

=234x100

=23400

a.\(\dfrac{18}{15}+\dfrac{7}{15}+\dfrac{12}{15}=\dfrac{18+7+12}{15}=\dfrac{37}{15}\)

b.\(\dfrac{9}{7}+\dfrac{8}{7}+\dfrac{11}{7}=\dfrac{9+8+11}{7}=\dfrac{28}{7}=4\)

chưa kịp xem hết ý a =')

a) 98+3+97+2
= (98+2)+(97+3)
= 100 + 100
= 200

 56+399+1+4
= (56+4)+(399+1)
= 60 + 400
= 460

b)364+136+219+181
= (364+136)+(219+181)
= 500 + 400
= 900

 178+277+123+422
= (178+422)+(277+123)
= 600 + 400
= 1000
 

a: 27,3x0,25x40

=27,3x10

=273

b: 1,25x91,74x8=10x91,74=917,4

c: 37,58x75,6+62,42x75,6

=75,6x(37,58+62,42)

=75,6x100=7560

d: 53,8x98+53,8+52+1,8

=53,8x98+53,8+53,8

=53,8x(98+1+1)

=53,8x100=5380

\(a,=\left(\dfrac{3}{5}+\dfrac{3}{5}+\dfrac{6}{5}\right)\times\left(\dfrac{6}{7}:7\right)=3\times\dfrac{6}{49}=\dfrac{18}{49}\)

\(\dfrac{3}{5}\times\dfrac{6}{7}+\dfrac{3}{5}:7+\dfrac{6}{5}\\ =\dfrac{3}{5}\times\dfrac{6}{7}+\dfrac{3}{5}\times\dfrac{1}{7}+\dfrac{6}{5}\\ =\dfrac{3}{5}\times\left(\dfrac{6}{7}+\dfrac{1}{7}\right)+\dfrac{6}{5}\\ =\dfrac{3}{5}+\dfrac{6}{5}=\dfrac{9}{5}\)