Question

tinh nhanh 6,8*3+6,8*2+13,6*2+6,8

Answer 1

\(6,8\cdot3+6,8\cdot2+13,6\cdot2+6,8\)

\(=6,8\cdot3+6,8\cdot2+6,8\cdot2\cdot2+6,8\)

\(=6,8\cdot3+6,8\cdot2+6,8\cdot4+6,8\)

\(=6,8\cdot\left(3+2+4+1\right)\)

\(=6,8\cdot10\)

\(=68\)

nha !!!

Answer 2

6,8x3+6,8x2+13,6x2+6,8

= 6,8x3+6,8x2+6,8x2x2+6,8

=6,8x(3+2+4+1)

=6,8x10

=68

Answer 3

68 nha