简便计算：19又19/23+30又4/23*0.125+1/2*30又4/23+31又4/23*3/8
问题描述：
简便计算：19又19/23+30又4/23*0.125+1/2*30又4/23+31又4/23*3/8
答
(19+ 19/23) + (30+ 4/23) X 0.125 + 1/2 X (30+ 4/23) + (31+ 4/23) X 3/8
= 19+ 19/23 + (30+ 4/23) X 1/8 + 4/8 X (30+ 4/23) + (30+ 4/23 +1) X 3/8
= 19+ 19/23 + (30+ 4/23) X 5/8 + (30+ 4/23) X 3/8 + 3/8
= 19+ 19/23 + 30+ 4/23 + 3/8
= 49+ 23/23 + 3/8
= 50+ 3/8
= 50.375