Question

Cơ hội

10 x 11+ 10 x 12+10 x 13+10 x 20=?

20-10+10-10+2-3=?

Answer 1

10x11x10x12x0x13x10x20=343200000

20-10+10-10+2-3=9

Answer 2

10x11+10x12+10x13+10x20

=10x(11+12+13+20)

=10x56

=560

20-10+10-10+2-3=9

Answer 3

= 10 * ( 11 + 12 +13 +20 )

= 10 * 56

= 560

20 - 10 + 10 - 10 +2 - 3 

= 10 - 10 + 10 - 10 + 2 - 3

= 0 + 10 - 10 + 2 - 3

= 10 - 10 + 2 - 3

= 0 + 2 - 3

= 2 - 3

= -1

Answer 4

10*11+10*12+10*13+10*20=10*[11+12+13+20]=10*56=560

Answer 5

a=560

b=9

Answer 6

10x11+10x12+10x13+10x20=10x(11+12+13+20)=10x56=560                                                                                                                       20-10+10-10+2-3=9