1 + 1 x 1 +1 = 1 + 1 +1 = 3
2 + 2 x 2 +2 = 2 + 4 + 2 = 8
3 + 3 - 3 + 3 = 6 - 3 + 3 = 6
4 - 4 + 4 - 4 = 0 + 4 - 4 = 0
5 x 5 - 5 x 5 = 25 - 25 =0
1 + 1 + 2 + 3 + 4 + 5 = 16
1 x 1 x 2 x 3 x 4 x 5 = 120

1 + 1 x 1 + 1 = 3

2 + 2 x 2 + 2 = 8

3 + 3 x 3 + 3 = 15

4 - 4 + 4 - 4 = 0

5 x 5 - 5 x 5 = 0

1 + 1 + 2 + 3 + 4 + 5 =16

1 x 1 x 2 x 3 x 4 x 5 = 120

k nh

1 + 1 * 1 + 1 = 1 + 1 + 1 = 3

2 + 2 * 2 + 2 = 2 + 4 + 2 = 8

3 + 3 - 3 + 3 = 6 - 3 + 3 = 3 + 3 = 6

4 - 4 + 4 - 4 = 0 + 4 - 4 = 4 -4 = 0

5 * 5 - 5 * 5 = 25 - 25 = 0

1 + 1 + 2 + 3 + 4 + 5 = 2 + 2 + 3 + 4 + 5 = 4 + 3 + 4 + 5 = 7 + 4 + 5 =11 + 5 = 16

1 * 1 * 2 * 3 * 4 * 5 = 120

Nhớ k cho mk nha !!

\(\left(\dfrac{1}{5}\right)^5\cdot5^5+\dfrac{8^{13}}{4^{18}}\)

\(=1+\dfrac{2^{39}}{2^{36}}\)

=9

máy tính hoặc não

4/9-5/18 = 8/18 - 5/18 = 3/18 = 1/6

3/5x5/7 = 3/7

4/7:2/7 = 4/7 x 7/2 = 2

4/9-5/18= 8/18 - 5/18 = 3/18 = 1/6

 3/5x5/7=15/35 = 3/7    

4/7:2/7=4/7 x 7/2 = 4/2 = 2

5x5 - 5x5 = 25 - 25 = 0

              Đáp số : 0 nhé bạn

zero nak! ~ mk đg nhớ 1 ng......ai đồng cảm thì kết bạn nhe!

0 nhé bạn

5 + 5 x 5 - 5 + 5 x 5 : 5 

= 5 + 25 - 5 + 5

= 30

= 5 + 25 - 5 + 25 : 5

= 5 + 25 - 5 + 5

= 30 - 5 + 5

= 25 + 5

= 30

5+5*5-5+5*5:5

=5+25-5+5

=30

\(a,\dfrac{7}{15}+\dfrac{4}{5}=\dfrac{7+4\times3}{15}=\dfrac{19}{15}\\ b,\dfrac{2}{3}-\dfrac{3}{8}=\dfrac{2\times8-3\times3}{24}=\dfrac{7}{24}\\ c,\dfrac{4}{5}\times\dfrac{5}{8}=\dfrac{1\times1}{2\times1}=\dfrac{1}{2}\\ d,\dfrac{1}{2}:\dfrac{2}{5}=\dfrac{1}{2}\times\dfrac{5}{2}=\dfrac{5}{4}\)

nhanh lên giúp mình với

a) \(\dfrac{7}{15}+\dfrac{4}{5}\)

\(=\dfrac{7}{15}+\dfrac{12}{15}\)

\(=\dfrac{19}{15}\)

b) \(\dfrac{2}{3}-\dfrac{3}{8}\)

\(=\dfrac{16}{24}-\dfrac{9}{24}\)

\(=\dfrac{7}{24}\)

c) \(\dfrac{4}{5}\times\dfrac{5}{8}\)

\(=\dfrac{4\times5}{5\times8}\)

\(=\dfrac{4}{8}\)

\(=\dfrac{1}{2}\)

d) \(\dfrac{1}{2}:\dfrac{2}{5}\)

\(=\dfrac{1}{2}\times\dfrac{5}{2}\)

\(=\dfrac{1\times5}{2\times2}\)

\(=\dfrac{5}{4}\)

4⁵ x 5²⁵

= 4⁵ x 5^{5 x 5}

= 4⁵ x 25⁵

= ( 4 x 25 )⁵

= 100⁵

\(4^5.5^{25}=4^5.3125^5=12500^5\)\(\)

4⁵x5²⁵=4⁵x(5⁵)⁵=4⁵x25⁵=(4x25)⁵=100⁵=100000

a. 1/3 + 1/4 - 1/6

= 7/12 - 1/6

= 5/12

b. 2/5 x 5/7 : 3/4

= 2/7 : 3/4

= 8/21