a, 4¹⁰. 2³⁰=2²⁰.2³⁰=2⁵⁰

b,9²⁵.27⁴.81³= 3⁵⁰.3¹².3¹²=3⁷⁴

Tương tự các câu khác....

a, 4¹⁰.2³⁰ = (2²)¹⁰.2³⁰ = 2²⁰.2³⁰ = 2⁵⁰
b, 9²⁵.27⁴.81³ = (3²)²⁵.(3³)⁴.(3⁴)³ = 3⁵⁰.3¹².3¹² = 3⁷⁴
c, 25⁵⁰.125⁵ = (5²)⁵⁰.(5³)⁵ = 5¹⁰⁰.5¹⁵ = 5¹¹⁵
d, 64³.4⁸.16⁴ = (2⁶)³.(2²)⁸.(2⁴)⁴ = 2¹⁸.2¹⁶.2¹⁶ = 2⁵⁰
e, 3⁸ : 3⁶ = 3²
2¹⁰ : 8³ = 2¹⁰ : (2³)³ = 2¹⁰ : 2⁹ = 2
12⁷ : 6⁷ = (12 : 6)⁷ = 2⁷
@Dương Tuyết Mai

bai toán này kho lắm

tớ cũng đanh thắc mắc câu này

12 mình chịu

11/15 + 8/5=                   Tính phân số

6/7 - 5/21=

25/4 x 16/100

7 x 2/49 =

4/3 : 2/9

5/8 : 25 =

đây là kết quả của mình nhé .

7 x 8 = 56       16 : 2 = 8       36 : 6 = 6       49 : 7 = 7

2 x 5 = 10       72 : 8 = 9       9 x 3 = 27       63 : 7 = 9

6 x 4 = 24       25 : 5 = 5       4 x 8 = 32       7 x 5 = 35

7 x 8 = 56

2 x 5 = 10

6 x 4 = 24

16 : 2 = 8 

72 : 8 = 9

25 : 5 = 5

36 : 6 = 6

9 x 3 = 27

4 x 8 = 32

49 : 7 = 7

63 : 7 = 9

7 x 5 = 35

1: =>x=8-35=-27

2: =>15-4+x=6

=>x+11=6

hay x=-5

3: =>-30+25-x=-1

=>x+5=1

hay x=-4

4: =>x-(-13)=-8

=>x+13=-8

hay x=-21

5: =>x-29-17+38=-9

=>x-8=-9

hay x=-1

\(\dfrac{37\cdot5^4}{25^2}=\dfrac{37\cdot5^4}{5^4}=37\\ \dfrac{2^4\cdot2^6\cdot3^8\cdot9^2}{4^4\cdot3^{11}}=\dfrac{2^{10}\cdot3^8\cdot3^4}{2^8\cdot3^{11}}=2^2\cdot3=12\\ \dfrac{3\cdot9^4\cdot9^3}{3^2\cdot9}=\dfrac{3\cdot3^8\cdot3^6}{3^2\cdot3^2}=3^{11}\\ \dfrac{125\cdot5\cdot64-25^3\cdot10\cdot4}{5^7\cdot8}=\dfrac{5^3\cdot5\cdot2^6-5^6\cdot2\cdot5\cdot2^2}{5^7\cdot2^3}=\dfrac{5^4\cdot2^3\left(2^3-5^3\right)}{5^7\cdot2^3}=\dfrac{8-125}{5^3}=\dfrac{-117}{125}\)

\(\dfrac{7}{8}\) \(\times\) \(\dfrac{1}{6}\) + \(\dfrac{7}{8}\) \(\times\) \(\dfrac{2}{6}\) + \(\dfrac{7}{8}\) \(\times\) \(\dfrac{1}{2}\)

= \(\dfrac{7}{8}\) \(\times\) ( \(\dfrac{1}{6}\) + \(\dfrac{2}{6}\) + \(\dfrac{1}{2}\) )

= \(\dfrac{7}{8}\) \(\times\) ( \(\dfrac{3}{6}\) + \(\dfrac{1}{2}\))

=  \(\dfrac{7}{8}\) \(\times\) ( \(\dfrac{1}{2}\) + \(\dfrac{1}{2}\))

= \(\dfrac{7}{8}\) \(\times\) 1

= \(\dfrac{7}{8}\)

    25 \(\times\) 5 \(\times\) 4 \(\times\)2  - 176

= (25 \(\times\) 4 ) \(\times\) ( 5 \(\times\) 2) - 176

= 100 \(\times\) 10 - 176

= 1000 - 176

= 824

\(\dfrac{7}{8}\times\dfrac{1}{6}+\dfrac{7}{8}\times\dfrac{2}{6}+\dfrac{7}{8}\times\dfrac{1}{2}\)

\(=\dfrac{7}{8}\times\left(\dfrac{1}{6}+\dfrac{2}{6}+\dfrac{1}{2}\right)\)

\(=\dfrac{7}{8}\times1\)

\(=\dfrac{7}{8}\)

__________________________ 

\(25\times5\times4\times2-176\)

\(=\left(25\times4\right)\times\left(4\times2\right)-176\)

\(=1000-176\)

\(=824\)

Chúc bạn học tốt

7/8x1/6+7/8x2/6+7/8x1/2

= 7/8x1/6+7/8x2/6+7/8x3/6

= 7/8x(1/6+2/6+3/6)

= 7/8x 1

= 7/8

25x5x4x2-176

=(25x4)x(5x2) -176

=100x10-176

=1000-176

=824

8 x 75 x 3 + 6 x 25 x 4 - 240
___________________________
15 x 2 x 6 + 18 x 16 x5

= 24 x 75 + 24 x 25 - 240 x 10
_________________________
  3 x 5 x 2 x 6 + 3 x 6 x 2 x 8 x5

= 24 x (75 + 24 -10)
  _________________
   3x5x2x6x ( 1+8)

= 24 x 9 x 10          4
   _________=     ___
    18 x 10 x 9         3

https://hoc24.vn/cau-hoi/8-x-75-x-3-6-x-25-x-4-240-15-x-2-x-6-18-x-16-x5tinh-nhanh.5861050326868

2160/720

a, 25*5*13*4=6500

87*125*8*4=348000

b,50*76*2=7600

19*4*25*8=15200

c,303*20*6*5=181800

4*889*25=88900

a)6500,348000.

b)7600,15200.

c)181800,88900.

a,= ( 25x4 ) x ( 13x5 )

   = 100 x 65

    = 6500

     = ( 125x8 ) x ( 87x4 )

      = 1000 x 348

       = 348000

b,    = ( 50x2 ) x 76

        = 100 x 76

        = 7600

         = ( 4x25 ) x ( 19x8 )

          =100 x 152

           = 15200

          c, = ( 20x5 ) x ( 303x6 )

               = 100 x 1818

                = 181800

               = ( 4x25 ) x 889

               = 100 x 889

                = 88900