Question

Find the fraction suitable for the blank space:
3½ + (1½ × ....) = 4½​

Answer 1

2/3

Explanation:

Since you need to find the mising number, I will give it the variable (v)

So the equation is now:

1½v is the same as 1½ x v

3½ + (1½v) = 4½

I need to undo addition so I subtract. To undo you need to look at the sign at the front of the number, since there was no negative sign I can infer that 3½ is positive. I need 3½ to cancel out and become 0, so I subtracted 3½ with 3½. What you do to one side of the equal sign, do to the other. 4½ subtract 3½ is 1.

The equation is now:

1½v = 1

I need to undo multiplication, so I divide 1½ by 1½. It cancels out, and I what you do to one side of the equal sign, you do to the other. 1 divides by 1½ is 2/3. (I used a calculator for this part)