Question

tính nhanh

10+12+14+16+18+20

Answer 1

số cần tìm:

10+12+14+16+18+20=90

đáp số:90

Answer 2

(10+20)+(12+18)+(14+16)

=30+30+30=30×3

=90

Answer 3

  10+12+14+16+18+20

=(10 + 20 ) + (14 + 16 ) + ( 12 + 18 )

= 30 + 30 + 30 

= 90

k nha

Answer 4

10+12+14+16+18+20

=(10+20)+(12+18)+(14+16)

=30+30+30

=30x3

=90