(1-1/2)x(2-2/3)x(3-3/4)x……x(8-8/9)x(9-9/10)用简便运算偶是小6的学生``帮个忙了各位

Question

(1-1/2)x(2-2/3)x(3-3/4)x……x(8-8/9)x(9-9/10)
用简便运算
偶是小6的学生``
帮个忙了各位

Answer 1

(1-1/2)x(2-2/3)x(3-3/4)x……x(8-8/9)x(9-9/10)
=1/2×4/3×9/4×16/5×25/6×36/7×49/8×64/9×81/10
=(1×2×3×4×5×6×7×8×9)/10
=3×4×6×7×8×9
=36288
计算过程中要注意约分。