Question

Решите пожалуйста: -3 1/2 * 2/5 -3/8 * 12/5 +1 * 3/10

Answer 1

.................................

Answer 2

1)- 3 1/2 *  2/5 =  - 7/2 *  2/5 =  - 7/5 = - 1 2/5
2)3/8 * 12/5 = 36/40= 9/10
3)1  ×  3/10 =  3/10
4)- 1 2/5  -  9/10 = - 7/5  -  9/10 =  (-7 × 2  -  9 × 1)/10 = -14/10  -  9/10 =  - 23/10 = - 2 3/10
5)- 2 3/10  +  3/10 =- 23/10  +  3/10 = -23 /10 +  3/10 =  - 20/10 = - 2