(10减3/8减5/8) (2/9乘0.375除以6/7)!
问题描述:
(10减3/8减5/8) (2/9乘0.375除以6/7)!
简便计算!
答
(10 - (3/8 + 5/8))(2/9 x 375/1000 x 7/6)
= (10 - 1)(2/9 x 3/8 x 7/6)
= (9 x 2/9)x (3/8 x 7/6)
= 2 x 7/16
= 7/8分开的!10 - 3/8 - 5/8
= 10 - (3/8 + 5/8)
= 10 - 1
= 9
2/9 x 0.375 x 7/6
= 2/9 x 375/1000 x 7/6
= 2/9 x 3/8 x 7/6 (分子2、3跟分母6约掉)
= 1/9 * 1/8 x 7
= 7/72