Page 1 of 2
1 Add the Decimals
Line up the decimal points in your head, then add.
0.3 + 0.4 =
1.5 + 2.3 =
3.7 + 1.6 =
4.2 + 3.8 =
0.9 + 0.8 =
5.4 + 2.9 =
6.1 + 3.7 =
7.6 + 2.4 =
8.3 + 1.9 =
0.5 + 9.5 =
2.8 + 4.7 =
6.6 + 6.6 =
2 Line Up & Add ⬇️
The decimal points are already lined up. Add column by column from right to left.
3 Place-Value Addition 📊
Fill in the blanks. Remember to carry when the tenths add up to 10 or more.
| Tens | Ones | . | Tenths |
|---|
| | 3 | . | 6 |
| + | | 4 | . | 8 |
| = | | | . | |
| Tens | Ones | . | Tenths |
|---|
| 1 | 5 | . | 7 |
| + | | 8 | . | 9 |
| = | | | . | |
Page 2 of 2
4 Add a Whole Number and a Decimal
Remember: 5 is the same as 5.0 — just add a decimal point and zero!
3 + 2.7 =
8.4 + 6 =
12 + 4.9 =
7.5 + 10 =
15 + 3.8 =
9.1 + 20 =
5 Find the Missing Decimal 🔍
What number goes in the blank?
2.3 + = 5.0
+ 4.6 = 9.1
3.8 + = 7.5
+ 6.7 = 12.0
8.4 + = 15.2
+ 1.9 = 8.3
6 Word Problems 📖
Write the equation and solve.
- 1. A book is 3.5 cm thick. Another book is 2.8 cm thick. If you stack them, how thick is the stack?
Equation: Answer: cm
- 2. Maya ran 4.6 km on Monday and 5.7 km on Tuesday. How far did she run in total?
Equation: Answer: km
- 3. A smoothie recipe uses 1.5 cups of banana and 0.8 cups of yogurt. How many cups is that altogether?
Equation: Answer: cups
- 4. Jake's backpack weighs 6.3 kg. He puts in a laptop that weighs 2.9 kg. What is the total weight?
Equation: Answer: kg
Ex 1: 0.7, 3.8, 5.3, 8.0, 1.7, 8.3, 9.8, 10.0, 10.2, 10.0, 7.5, 13.2
Ex 2: 5.9, 7.5, 12.2, 16.3, 22.3
Ex 3: 8.4, 24.6
Ex 4: 5.7, 14.4, 16.9, 17.5, 18.8, 29.1
Ex 5: 2.7, 4.5, 3.7, 5.3, 6.8, 6.4
Ex 6: 6.3, 10.3, 2.3, 9.2