14
9
You need to add 18 to negative 8 to get 10.
You need to add 6 - (-9) = 6 + 9 = 15.
You need to add 12.
you need to add 10
21
The two numbers that add to 2 and multiply to -48 are 8 and -6. When you add them together, 8 + (-6) equals 2. When you multiply them, 8 × (-6) equals -48.
You need to add 7 (or +7)
You can add the whole part of the numbers separately - no need to convert those. Then add the fractional parts in the usual way, i.e., find a common denominator, convert the fractions to this denominator, and add the numerators. Here is an example: 5 1/2 + 3 2/3 Add the whole part and the fractional part separately: 8 + (1/2 + 2/3) Convert to a common denominator: 8 + (3/6 + 4/6) Add the fractional part: 8 7/6 Since in this case 7/6 is greater than 1, you need to subtract one, and add one to the whole part: 7 1/6
2
12
To find out what you need to add to -6 to get 4, you can set up the equation: -6 + x = 4. By solving for x, you add 6 to both sides, resulting in x = 4 + 6, which simplifies to x = 10. Therefore, you need to add 10 to -6 to get 4.