Question

tính thuận tiện:

3999+2999+2+3999+2999+2

Answer 1

\(3999+2999+2+3999+2999+2\\ =\left(3999+2999+2\right)+\left(3999+2999+2\right)\\ =2\cdot\left(3999+2999+2\right)\\ =2\cdot7000\\ =14000\)

Answer 2

\(3999+2999+2+3999+2999+2\)

= \(\left(3999+3999\right)+\left(2999+2999\right)+\left(2+2\right)\)

= \(7998+5998+4\)

= \(13996+4\)

= \(14000\).

Chúc bạn học tốt!

Answer 3

3999+2999+2+3999+2999+2

=(3999+3999)+(2999+2999)+(2+2)

=7998+5998+4

=13996+4=14000

Thế nhé