Question

Tính nhanh:

1+2+3+4+5+6+7+8++9+10

Ai nhanh mik tik

Answer 1

1+2+3+4+5+6+7+8+9+10

=(1+9)+(2+8)+(3+7)+(4+6)+10+5

=10+10+10+10+10+5

=5x10+5

=50+5

=55

Answer 2

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9

= ( 1 + 9 ) + ( 2 + 8 ) + ( 3 + 7 ) + ( 4 + 6 ) + 5

=   10      +   10      +    10   +   10   + 5

=  10 x 4 + 5 

= 40 + 5 

= 45

Answer 3

55 nha

k cho mik

Answer 4

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 55 

Answer 5

1+2+3+4+5+6+7+8+9+10=55

Answer 6

   1+2+3+4+5+6+7+8+9+10

=(1+9)+(2+8)+(3+7)+(4+6)+(5+5)+10

= 10  +   10   +  10 +10  +10  +10

=10x6

=60

Answer 7

55

mìn tín tong 5 tây bạn ạ

Answer 8

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10

= ( 1 + 9 ) + ( 2 + 8 ) + ( 3 + 7 ) + ( 4 + 6 ) + 5 + 10

=  10 + 10 + 10 + 10 + 10 + 5

= 10 x 5 + 5

= 55 

Answer 9

1+2+3+4+5+6+7+8+9+10

(1+10)+(2+9)+(3+8)+(4+7)+(5+6)

11+11+11+11+11

11x5

55

Answer 10

Sorry mik nhầm nhé

Answer 11

1+2+3+4+5+6+7+8+9+10=(1+9)+(2+8)+(3+7)+(4+6)+10+5=55

.

Answer 12

mình tính ra được 55

Answer 13

bang 55 nha ban!

Answer 14

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 

=( 1 + 9) + ( 2 + 8 ) + ( 3 + 7 ) + ( 4 + 6 )  + 5 

= 10 + 10 + 10 + 10 + 5 

= 40 + 5 

= 45

Answer 15

=55 nha 

Answer 16

1+2+3+4+5+6+7+*+9+10

=(1+9)+(2+8) +(3+7)+(4+6)+5+10

=10+10+10+10+10+5

=20+20+15

=40+15

=55