Question

tính nhanh :

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

Answer 1

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

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

= 10 +     10    +    10    +    10   +     10    +    10

=   60 

Answer 2

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

\(=10+5+5+6+4+7+3+8+2+9+1\)\(=60\)

Answer 3

= 10+5+5+6+4+7+3+8+2+9+1 =10*6 = 60

Answer 4

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

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

= 10+ 10+ 10+ 10+ 10+ 10

= 10 x 6

=60

Answer 5

10+5+6+7+8+9+1+2+3+4+5=60

Answer 6

k nha ae

Answer 7

60

tk nhe

xin do