1/8*4/7+12.5*5/7简便运算_数学解答

1/8*4/7+12.5*5/7简便运算

人气：246 ℃　时间：2020-03-24 09:54:01

解答

1/8×4/7+12.5×5/7
=1/8×4/7+100/8×5/7
=1/8×4/7+1/8×500/7
=1/8×(4/7+500/7)
=1/8×504/7
=63/7
=9