Answer:
-9
Step-by-step explanation:
Think about the Keep and change rule, since this is negative, the more negative numbers there are the more it will go deeper. -4 - 5 is -9 because just create a number line and place -4 one it, then jump backwards 5 times.
25 anything raised to zero equals one
Hope this helps! I can resubmit if my hand writing is too bad.
Answer:39
Step-by-step explanation:
90-51=39