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 plus 8 equals 10.
In addition and subtraction, if the plus sign is larger than the minus sign, then it's a plus. For example: +10 minus -20 = -10 If the plus sign is smaller than the minus sign, the answer will be a minus. For example: -10 minus + 20 = -10 In multiplication, if you have 2 plus signs, the answer will be a plus sign. If you have 2 minus signs, the answer will be a plus sign then, too. But if you have a plus and a minus sign, then the answer will be a minus. For example: +5 x + 2 = +10 -5 x - 2 = +10 -5 x +2 = -10
2 x 5 = 10.
2•2•5•3•7•11=4,620 
2 and a half plus 2 and a half plus 10 plus 10 = 25
140
7585
5.45
7
15.
2 x 3 x 5 is the prime factorization of 30.
The product is 1285
10
2+4+8+2+10+6 = 6+8+2+10+6 = 14+2+10+6 = 16+10+6 = 26+6 = 32