=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

bằng 275

275 nha

25 x 11 =275

k minh di nha

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 ^^)

25 . 4=100

cj bb^^

\(25+25+25+25=25\cdot4=200\)

Aj k mk mk k lại ckoa!^^

=25x4=100

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

=25*10

=250

25x10=250

25+25+25+25+25+25+25+25+25+25=25x10=250

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

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

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

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

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

= \(25.\frac{23}{200}\)

= \(\frac{23}{8}\)

=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