\(...=25x10=250\)

    25 + 25 + 25 + 25 + 25 + 25 + 25 + 25 + 25 + 25

= 25 x 10

= 250

= 25x10
= 250

=25*10=250

chúc bạn học tốt

25 + 25 + 25 + 25 + 25 + 25 + 25 + 25 + 25 + 25 = ?

= 25 x 10

= 250

25 + 25 + 25 + ..... + 25 (10 số 25) = 25 x 10 

                                                   = 250

5+ 5 + 5 + 5+ 5 + 5 +5+ 5 + 5 +5=5x10=50

25 + 25 + 25 + 25 + 25 + 25 +25 + 25=25x8=200

45 + 45 + 45 + 45 + 15 + 15 + 15 + 15=(45x4)+(15x4)=180+60=240

5+ 5 + 5 + 5+ 5 + 5 +5+ 5 + 5 +5
= 5 x 10
= 50

25 + 25 + 25 + 25 + 25 + 25 +25 + 25
= 25 x 8
= 200

45 + 45 + 45 + 45 + 15 + 15 + 15 + 15
= 45 x 4 + 15 x 4
= 180 + 60
= 240

2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18
= (2 + 18) + (4 + 16) + (8 + 12) + (6 + 14) + 10
= 20 + 20 + 20 + 20 + 10 
= 20 x 4 + 10
= 80 + 10
= 90 

125 + 125 + 125 + 125 - 25 - 25 - 25 - 25 
= 4 x (125 - 25) 
= 4 x 100 
= 400
(Tick cho mk pls ^^)

=2500

Ai tích mk  mk sẽ tích lại

64*25+35*25+25

=25*(64+35+1)

=25*100

=2500

=25x(64+35+1)

=25x100

=2500

. là gì hả bạn

12.25+29.25+59.25

=25.(12+29+59)

=25.100

=2500.

12.25+29.25+59.25

=25.(12+29+59)

=25.100

=2500

\(\frac{25}{72}+\frac{25}{90}+\frac{25}{110}+...+\frac{25}{9900}\)

= \(25.\left(\frac{1}{72}+\frac{1}{90}+\frac{1}{110}+...+\frac{1}{9900}\right)\)

= \(25.\left(\frac{1}{8.9}+\frac{1}{9.10}+\frac{1}{10.11}+...+\frac{1}{99.100}\right)\)

= \(25.\left(\frac{1}{8}-\frac{1}{9}+\frac{1}{9}-\frac{1}{10}+\frac{1}{10}-\frac{1}{11}+...+\frac{1}{99}-\frac{1}{100}\right)\)

= \(25.\left(\frac{1}{8}-\frac{1}{100}\right)\)

= \(25.\frac{23}{200}\)

= \(\frac{23}{8}\)

48 x 25 + 53 x 25 - 25

= 48 x 25 + 53 x 25 - 25 x 1

= 25 x ( 48 + 53 - 1 )

= 25 x ( 101 - 1 )

= 25 x 100

= 2500

48×25+53 ×25 -25

= 25x( 48+53-1 )

=25x100

=2500

48 x 25 + 53 x 25 - 25

= 48 x 25 + 53 x 25 - 25 x 1

= 25 x 48 + 25 x 53 - 25 x 1

= 25 x ( 48 + 53 - 1 )

= 25 x 100

= 2500

25 x 25 + 10 x 25 + 89

= 25 x (25 + 10) + 89

= 25 x 35 + 89

= 875 + 89

= 964

chuẩn men

964 chắc chắn 100 %