Resourceful Practise Worksheets For LKG Classes Maths & English ... - Free Printable

Problem: Solve the given number sentences and explain the solution.

#### Section 1: Make these sums true.

We need to fill in the blanks to make each equation true.

1. 1 + □ = 5
- To find the missing number, subtract 1 from 5:
\[
5 - 1 = 4
\]
- So, the equation becomes: \( 1 + 4 = 5 \).

2. □ + 3 = 7
- To find the missing number, subtract 3 from 7:
\[
7 - 3 = 4
\]
- So, the equation becomes: \( 4 + 3 = 7 \).

3. 2 + 6 = □
- Add 2 and 6:
\[
2 + 6 = 8
\]
- So, the equation becomes: \( 2 + 6 = 8 \).

4. 12 + 5 = □
- Add 12 and 5:
\[
12 + 5 = 17
\]
- So, the equation becomes: \( 12 + 5 = 17 \).

5. 14 + □ = 19
- To find the missing number, subtract 14 from 19:
\[
19 - 14 = 5
\]
- So, the equation becomes: \( 14 + 5 = 19 \).

6. □ + 7 = 20
- To find the missing number, subtract 7 from 20:
\[
20 - 7 = 13
\]
- So, the equation becomes: \( 13 + 7 = 20 \).

Final answers for Section 1:
\[
\boxed{4, 4, 8, 17, 5, 13}
\]

---

#### Section 2: Colour the true sums. Cross out the false sums.

We need to evaluate each sum and determine if it is true or false.

1. 2 + 5 = 9
- Calculate: \( 2 + 5 = 7 \)
- This is false because \( 7 \neq 9 \).
- Cross out: 2 + 5 = 9

2. 3 + 6 = 9
- Calculate: \( 3 + 6 = 9 \)
- This is true.
- Colour: 3 + 6 = 9

3. 4 + 5 = 9
- Calculate: \( 4 + 5 = 9 \)
- This is true.
- Colour: 4 + 5 = 9

4. 15 + 5 = 20
- Calculate: \( 15 + 5 = 20 \)
- This is true.
- Colour: 15 + 5 = 20

5. 11 + 5 = 17
- Calculate: \( 11 + 5 = 16 \)
- This is false because \( 16 \neq 17 \).
- Cross out: 11 + 5 = 17

6. 13 + 5 = 18
- Calculate: \( 13 + 5 = 18 \)
- This is true.
- Colour: 13 + 5 = 18

Summary for Section 2:
- True sums: \( 3 + 6 = 9 \), \( 4 + 5 = 9 \), \( 15 + 5 = 20 \), \( 13 + 5 = 18 \)
- False sums: \( 2 + 5 = 9 \), \( 11 + 5 = 17 \)

---

#### Section 3: Write three sums which equal the same amount.

We need to write three different pairs of numbers that add up to the same totals: 10, 15, 18, and 20.

1. Sums equal to 10:
- \( 1 + 9 = 10 \)
- \( 2 + 8 = 10 \)
- \( 3 + 7 = 10 \)

2. Sums equal to 15:
- \( 6 + 9 = 15 \)
- \( 7 + 8 = 15 \)
- \( 5 + 10 = 15 \)

3. Sums equal to 18:
- \( 9 + 9 = 18 \)
- \( 8 + 10 = 18 \)
- \( 7 + 11 = 18 \)

4. Sums equal to 20:
- \( 10 + 10 = 20 \)
- \( 11 + 9 = 20 \)
- \( 12 + 8 = 20 \)

Final answers for Section 3:
\[
\boxed{
\begin{array}{l}
1 + 9 = 10, \, 2 + 8 = 10, \, 3 + 7 = 10 \\
6 + 9 = 15, \, 7 + 8 = 15, \, 5 + 10 = 15 \\
9 + 9 = 18, \, 8 + 10 = 18, \, 7 + 11 = 18 \\
10 + 10 = 20, \, 11 + 9 = 20, \, 12 + 8 = 20
\end{array}
}
\]

---

Final Answer:

\[
\boxed{4, 4, 8, 17, 5, 13}
\]