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1 Subtract the Decimals
Line up the decimal points, then subtract.
0.9 − 0.3 =
3.8 − 1.5 =
5.4 − 2.7 =
7.0 − 3.6 =
8.2 − 4.8 =
6.1 − 2.9 =
10.0 − 4.3 =
9.5 − 6.7 =
12.3 − 5.8 =
15.1 − 9.4 =
20.0 − 8.6 =
11.2 − 7.5 =
2 Line Up & Subtract ⬇️
Subtract column by column. Borrow (regroup) when needed.
3 Number Line Subtraction 📏
Use the number line to help you subtract. Start at the first number and hop backward.
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
4.5 − 1.5 =
6.0 − 2.5 =
7.5 − 3.0 =
5.0 − 1.5 =
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4 Subtract a Decimal From a Whole Number
Remember: 8 = 8.0 — add the decimal point and zero before subtracting.
5 − 1.3 =
10 − 4.7 =
8 − 2.6 =
12 − 7.9 =
20 − 13.5 =
15 − 8.4 =
5 Find the Missing Decimal 🔍
What number goes in the blank?
6.5 − = 2.8
− 3.4 = 5.1
9.0 − = 4.7
− 7.6 = 8.4
15.3 − = 6.9
− 2.5 = 10.0
6 Word Problems 📖
Write the equation and solve.
- 1. A rope is 8.5 meters long. You cut off 3.7 meters. How long is the remaining piece?
Equation: Answer: m
- 2. The temperature was 15.2 °C in the morning and dropped by 6.8 °C at night. What is the temperature now?
Equation: Answer: °C
- 3. A container holds 10.0 liters of water. After drinking, there are 4.6 liters left. How much was drunk?
Equation: Answer: L
- 4. Mia's high jump record is 1.3 m. The school record is 1.8 m. How much higher is the school record?
Equation: Answer: m
Ex 1: 0.6, 2.3, 2.7, 3.4, 3.4, 3.2, 5.7, 2.8, 6.5, 5.7, 11.4, 3.7
Ex 2: 2.5, 4.6, 2.4, 5.7, 7.4
Ex 3: 3.0, 3.5, 4.5, 3.5
Ex 4: 3.7, 5.3, 5.4, 4.1, 6.5, 6.6
Ex 5: 3.7, 8.5, 4.3, 16.0, 8.4, 12.5
Ex 6: 4.8 m, 8.4 °C, 5.4 L, 0.5 m