Cần gấp thì bằng 202000 nhé! K cho mình

2020x45+2020x54+2020

=2020x45+2020x54+2020x1

=2020x(45+54+1)

=2020x100

=202000

\(25\times32\times125\times15\\=(25\times4)\times(8\times125)\times15\\=100\times1000\times15\\=100000\times15\\=1500000\)

25 x 32 x 125 x 15 

=(125 x 32 ) x (25 x 15 )

= 4000 x 375

=1 500 000

\(25\times32\times125\times15\)

\(=25\times4\times8\times125\times15\)

\(=\left(25\times4\right)\times\left(8\times125\right)\times15\)

\(=100\times1000\times15\)

\(=\left(1000\times15\right)\times100\)

\(=15000\times100=1500000\)

12,35 + 1,42 - 11,35 + 8,58

= (12,35 - 11,35) + (1,42 + 8,58)

= 1 + 10

= 11

12,35 + 1,42 - 11,35 + 8,58 
= 12,35 + (1,42 - 11,35 ) + 8,58 
= 12,35 - 9,93 + 8,58 
= 2,42 + 8,58 
= 11

(999+51)+(362+654398)

=1050+654760

=655810

     654398 + 362 + 999 + 51

= ( 654398 + 362 ) + ( 999 + 51 )

= 654760 + 1050

= 655810

(654398 + 362) + ( 999 + 51)

= 654760           +  1050

= 655810

2 600 000 m² + 58 700 m² + 400 000 m² + 1 300 m² =

(2 600 000 m²  + 400 000 m²) + (58 700 m² + 1 300 m²)=

3 000 000 m² + 7 000 m² = 

3 007 000 m²

 A = 24 x 73 + 12 x 90 - 24 x 18

 A = 24 x 73 + 12 x 2 x 45 - 24 x 18

 A = 24 x 73 + 24 x 45 - 24 x 18

 A = 24 x ( 73 + 45 - 18 )

 A = 24 x 100

A = 2400

5/12 x 2/3 + 2/3 x 7/12 + 1/3

= 2/3 x ( 5/12 + 7/12 ) + 1/3

= 2/3 x 1 + 1/3

= 2/3 + 1/3

= 1

5/12x2/3+2/3x7/12+1/3

=2/3x(5/12+7/12)+1/3

=2/3x1+1/3

=2/3+1/3

=1

k tui nha @@@

\(\frac{5}{12}\)x \(\frac{2}{3}\)+ \(\frac{2}{3}\)x \(\frac{7}{12}\)+ \(\frac{1}{3}\)

= \(\frac{2}{3}\)x ( \(\frac{5}{12}\)+ \(\frac{7}{12}\) ) + \(\frac{1}{3}\)

= \(\frac{2}{3}\)x 1 + \(\frac{1}{3}\)

= \(\frac{2}{3}\)+ \(\frac{1}{3}\)

= 1

=(1/11 + 4/11) + (3/4 + 1/4)

=5/11 + 4/4

=5/11+1

=5/11+ 11/11

=16/11

\(\frac{1}{11}+\frac{3}{4}+\frac{4}{11}+\frac{1}{4}\)

\(=\left(\frac{1}{11}+\frac{4}{11}\right)+\left(\frac{3}{4}+\frac{1}{4}\right)\)

\(=\frac{5}{11}+1\)

\(=1\frac{5}{11}\)

1/11+3/4+4/11+1/4

=(1/11+4/11)+(3/4+1/4)

=5/11+1

=16/11

21 x 25,36 + 25,36 x 80 - 25,36

= 21 x 25,36 + 25,36 x 80 - 25,36 x 1

= 25,36 x ( 21 + 80 - 1 )

= 25,36 x 100

= 2536

/HT\

21 x 25,36 + 25,36 x 80 - 25,36  

=21 x 25,36 + 25,36 x 80 - 25,36 x 1

=25,36 x (21 + 80 -1)

= 25,36 x 100

2536

25,36×21+25,36×80-25,36×1

=25,36×(21+80-1)

=25,36×100

=2536