1 add 4 is 5 and 2 add 3 make 5. 5 add 5 make 10 so 2 x 10 is 20
(-1)+(-2)=(-3) (-1)(-2)=2
3 * (2 - 1)
25
it is 1/3 * 2 : 3 = 1/3 * 2/3 = 2/9 = 0.22222...
4-3+2-1 = 2
2 x 3 - (4 + 1) = 1
4 + 1 - 2 = 3
(3 + 1)2 = 16
1 1 1 2 1 3 1 4 2 1 2 2 2 3 2 4 3 1 3 2 3 3 3 4 4 1 4 2 4 3 4 4
It is 3 1/2. To make it simpler, think of it as this:3 + 1/2 + 1/2 + 1/2 + 1/2 + 1/2 = 3 1/2
4! * 2 + 1 - 3 =24*2 + 1 - 3 = 48 + 1 - 3 = 46
2*(4! + 3) + 1 = 2*(24 + 3) + 1 = 2*27+1 = 54+1 = 55