It is: (2+10) times 5 = 60
10
16 plus 10 plus 8 plus 6 plus 2 is equal to 42.
2+2+2+10+5+5+5+20+20+20+20+20+20=151
2 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 = 106
15
2 x 5 = 10.
2 and a half plus 2 and a half plus 10 plus 10 = 25
2•2•5•3•7•11=4,620 
2 x 3 x 5 is the prime factorization of 30.
140
7
5.45
15.
7585
10
2+4+8+2+10+6 = 6+8+2+10+6 = 14+2+10+6 = 16+10+6 = 26+6 = 32
The product is 1285