Integers Introduction — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. Mia scored 5, lost 3, then won 7. Her score is 9.
5 minus 3 plus 7 equals 9, the running total of her score.
2. A bank balance of -20 dollars after a $50 deposit becomes 30.
-20 plus 50 equals 30 dollars, a positive balance after the deposit.
3. Subtracting 4 is the same as adding -4 to any integer.
Subtraction and adding the opposite produce identical results in integer arithmetic.
4. Leo lost 6 points then lost 4 more. His total change is -10.
Two negative changes combine to a single negative total of -10.
5. An ATM withdrawal of $15 from a $10 balance leaves -5.
10 minus 15 equals -5, showing an overdraft of five dollars.
6. Subtracting -3 is the same as adding 3 to a number.
Subtracting a negative integer adds its positive opposite to the number.
7. Game score: started at 0, gained 8, lost 12, gained 5 equals 1.
0 plus 8 minus 12 plus 5 equals 1, the final point total.
8. A balance of $25 minus a $40 charge equals -15.
25 minus 40 equals -15, a 15 dollar negative balance.
9. Rewrite 9 minus 6 as 9 plus -6.
Adding -6 produces the same answer as subtracting 6 from 9.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Lost 5 points
→ -5
-5
Deposited $7
→ +7
+7
Withdrew $4
→ -4
-4
Gained 10 points
→ +10
+10
Real-world losses match negatives and gains match positives, linking words to integer values.