Decimals class 5 interactive worksheet - Free Printable

Let's solve each question step by step from the Decimal Revision Math Worksheet.

---

1. Form the greatest number less than 1 using digits 5, 8 and 9 only once.

We need to form a decimal number less than 1, so it must be in the form of `0.XXX`.

We want the greatest such number using digits 5, 8, and 9 exactly once.

So we place the digits in descending order after the decimal point:

> 0.985

✔ Answer: 0.985

---

2. 0.723 × 1000 = ________

When multiplying a decimal by 1000, move the decimal point 3 places to the right.

0.723 → 723

✔ Answer: 723

---

3. Complete the given series.

#### (i) 2.7, 3.2, 3.7, 4.2, ____, ____

Look at the pattern:
- 3.2 - 2.7 = 0.5
- 3.7 - 3.2 = 0.5
- 4.2 - 3.7 = 0.5

So, increasing by 0.5 each time.

Next two terms:
- 4.2 + 0.5 = 4.7
- 4.7 + 0.5 = 5.2

✔ Answer: 4.7, 5.2

---

#### (ii) 5.73, 6.74, 7.75, ____, ____

Check differences:
- 6.74 - 5.73 = 1.01
- 7.75 - 6.74 = 1.01

So, increasing by 1.01

Next:
- 7.75 + 1.01 = 8.76
- 8.76 + 1.01 = 9.77

✔ Answer: 8.76, 9.77

---

#### (iii) 89.051, 189.061, 289.071, ____, ____

Check differences:
- 189.061 - 89.051 = 100.01
- 289.071 - 189.061 = 100.01

So, increasing by 100.01

Next:
- 289.071 + 100.01 = 389.081
- 389.081 + 100.01 = 489.091

✔ Answer: 389.081, 489.091

---

4. Find the number:

#### (i) 6 tenths more than 7.245

6 tenths = 0.6

So:
7.245 + 0.6 = 7.845

✔ Answer: 7.845

---

#### (ii) 6 thousandths added to 18.023

6 thousandths = 0.006

18.023 + 0.006 = 18.029

✔ Answer: 18.029

---

#### (iii) 8 tenths and 4 hundredths less than 7

First, convert:
- 8 tenths = 0.8
- 4 hundredths = 0.04
- So total subtracted = 0.8 + 0.04 = 0.84

Now:
7 - 0.84 = 6.16

✔ Answer: 6.16

---

#### (iv) 1 tenth and 5 thousandth more than 9

- 1 tenth = 0.1
- 5 thousandths = 0.005
- Total = 0.1 + 0.005 = 0.105

Now:
9 + 0.105 = 9.105

✔ Answer: 9.105

---

5. Choose the right answer and fill in the blank.

#### (i) 478.65 ÷ ________ = 47.865

We know that dividing by 10 moves the decimal one place left.

478.65 → 47.865 is a shift of one decimal place left, so divide by 10.

✔ Answer: (a) 10

---

#### (ii) 137.85 × 10 = ________

Multiplying by 10 → move decimal one place right:

137.85 × 10 = 1378.5

✔ Answer: (c) 1378.5

---

✔ Final Answers Summary:

1. 0.985
2. 723
3. (i) 4.7, 5.2
(ii) 8.76, 9.77
(iii) 389.081, 489.091
4. (i) 7.845
(ii) 18.029
(iii) 6.16
(iv) 9.105
5. (i) (a) 10
(ii) (c) 1378.5

Let me know if you'd like this formatted for printing or as a PDF!