Question

tính nhanh:

(11x9-100+1)x(1x2x3x4x5x6x7x8x9x10)

Answer 1

\(\text{(11x9-100+1)x(1x2x3x4x5x6x7x8x9x10) =(99-100+1)x(1x2x3x4x5x6x7x8x9x10) =0x(1x2x3x4x5x6x7x8x9x10) =0}\)

Answer 2

(11x9-100+1)x(1x2x3x4x...x9x10)

=( 99 - 100 +1) x1x2x3x4x...x9x10

=(99-99) x1x2x3x...x9x10

=0x1x2x3x...x9x10

=0

Chúc bạn học tốt!

Answer 3

\(\left(11\times9-100+1\right)\times\left(1\times2\times3\times4\times5\times6\times7\times8\times9\times10\right)\)

\(=\)\(\left(99-100+1\right)\times\left(1\times2\times3\times4\times5\times6\times7\times8\times9\times10\right)\)

\(=\)\(\left(-1+1\right)\times\left(1\times2\times3\times4\times5\times6\times7\times8\times9\times10\right)\)

\(=\)\(0\times\left(1\times2\times3\times4\times5\times6\times7\times8\times9\times10\right)\)

\(=\)\(0\)