Question

помогите дам 20 баллов)

Answer 1

1)а. 376=2•2•2•47
Б.2640=2•2•2•2•2•5•19

2)3 1/4=3,25
41/30=1,36......

3)хз
4)а. (1,225+0,05):0,25=1,275:0,25=5,1
б. 1:1 7/8 +3/7+3 1/3-3/6:5/6=1:15/8+3/7•10/3-3/6:5/6=1•8/15+3/7•9/3-1/2•6:5=8/15+9/7-3/5=56/105+135/105-69/105=128/105
В.9+1/9•27=9+3=12