Add, Subtract, Multiply, Divide Decimals worksheet - Free Printable

Let’s solve each problem step by step.

---

1. 0.2 + 2.4 =

Align the decimals and add:

```
0.2
+ 2.4
-----
2.6
```

✔ Answer: 2.6

---

2. 3.5 + 3.91 =

We can write 3.5 as 3.50 to match decimal places:

```
3.50
+ 3.91
------
7.41
```

✔ Answer: 7.41

---

3. 7.81 – 2.9 =

Write 2.9 as 2.90:

```
7.81
- 2.90
------
4.91
```

✔ Answer: 4.91

---

4. 0.27 × 100 =

Multiplying by 100 moves the decimal point two places to the right:

0.27 → 27.00

✔ Answer: 27

---

5. 0.2 × 0.4 =

Multiply as whole numbers first: 2 × 4 = 8
Count total decimal places: 0.2 has 1, 0.4 has 1 → total 2 decimal places
So, place decimal two places from right: 0.08

✔ Answer: 0.08

---

6. Show your work: 612.66 ÷ 6

This is long division.

```
102.11
_________
6 ) 612.66
-6
----
12
-12
----
06
- 6
----
06
- 6
----
0
```

Breakdown:

- 6 goes into 6 once → write 1 (hundreds place)
- 6 goes into 1? No → write 0 (tens place), bring down 2 → 12
- 6 goes into 12 twice → write 2 (ones place)
- Bring down decimal point
- Bring down 6 → 6
- 6 goes into 6 once → write 1 (tenths place)
- Bring down 6 → 6
- 6 goes into 6 once → write 1 (hundredths place)

✔ Answer: 102.11

---

7. Show your work: 10.3 × 12

We’ll use standard multiplication:

```
10.3
× 12
------
206 ← 10.3 × 2
1030 ← 10.3 × 10 (shifted one place left)
------
123.6
```

Steps:

- Multiply 10.3 × 2 = 20.6
- Multiply 10.3 × 10 = 103.0
- Add: 20.6 + 103.0 = 123.6

Alternatively, ignore decimals first:

103 × 12 = 1236
Now, original numbers had 1 decimal place (in 10.3) → so answer has 1 decimal place → 123.6

✔ Answer: 123.6

---

✔ Final Answers:

1. 2.6
2. 7.41
3. 4.91
4. 27
5. 0.08
6. 102.11 (work shown above)
7. 123.6 (work shown above)

You’re all set! 🎉