Question

помогите с З примерами даю ЗО баллов

Answer 1

1 2/3*0,81=1 2/3  * 81/100 = 5/3 *  81/100 =405/300=  27/20 = 1 7/20
1 3/5*85,6=1 3/5 *  85 6/10 = 8/5 *  428/5 =  3424/25 = 136 24/25
7 1/5*7,5=7 1/5  *  7 5/10 = 36/5  * 15/2 = 540/10= 54