Lesson 4: Decimal Subtraction with Regrouping — Practice Questions

1. 1. Calculate the difference: $15.7 - 4.28 = \_\_\_$.

2. 2. To solve $24.3 - 9.17$, which expression shows the correct first step of annexing a zero to prepare for subtraction?

   • A. $24.30 - 9.17$
   • B. $24.03 - 9.17$
   • C. $2.430 - 9.17$
   • D. $24.3 - 9.170$

3. 3. Subtract the following: $14 - 5.63 = \_\_\_$.

4. 4. A rope is 20 meters long. If a piece measuring 8.15 meters is cut from it, how many meters of rope are left?

   • A. 12.85
   • B. 11.85
   • C. 11.95
   • D. 12.95

5. 5. Find the value of the expression: $45.1 - 17.88 = \_\_\_$.

6. 6. To model the subtraction problem $3.52 - 1.29$, what is the first regrouping step required before you can subtract the hundredths place?

   • A. Trade 1 one flat for 10 tenth rods.
   • B. Trade 1 tenth rod for 10 hundredth cubes.
   • C. Remove 9 hundredth cubes from 2 hundredth cubes.
   • D. Add 1 tenth rod to the model.

7. 7. Using place value models, what is the difference when you subtract $1.38$ from $3.75$? The result is ___.

8. 8. In which of the following subtraction problems would you NOT need to regroup to find the difference?

   • A. 1.52 - 0.36
   • B. 2.89 - 1.74
   • C. 0.91 - 0.55
   • D. 4.03 - 2.11

9. 9. A student models $0.84$ with 8 rods and 4 cubes. To subtract $0.56$, they must regroup. After removing the blocks for $0.56$, the remaining value is ___.

10. 10. When you model subtraction, you start with blocks for the minuend. What is the next step?

    • A. Add blocks representing the subtrahend.
    • B. Remove blocks representing the subtrahend.
    • C. Model the subtrahend separately.
    • D. Count all the blocks together.