To find \( 23.45 - 68.7 \) using the additive inverse, we can rewrite the subtraction as follows:
\[ 23.45 - 68.7 = 23.45 + (-68.7) \]
Now, we need to find the sum of \( 23.45 \) and \( -68.7 \):
- Align the numbers:
23.45
+(-68.70)
- Subtract the smaller absolute value from the larger absolute value:
- \( 68.70 - 23.45 = 45.25 \)
Since the larger number, \( -68.7 \), is negative, the result will also be negative. Therefore:
\[ 23.45 - 68.7 = -45.25 \]
The correct response is:
−45.25 (negative 45.25)