Question

Tính nhanh:       56.64

Answer 1

\(56.64=\left(60-4\right).\left(60+4\right)=60^2-4^2=3600-16=3584\)

Answer 2

56x64=64x56 ^^

Answer 3

=(60-4)(60+4)

= 60²-4² 

= 3600 - 16

= 3584

Mình nghĩ như vậy !

Answer 4

56 . 64 = ( 60 - 4 ) ( 60 + 4 )

= 60² - 4²

= 3600 - 16

= 3584

Answer 5

\(56.64=\left(60-4\right).\left(60+4\right)=60^2-4^2=3584\)