 Study P2 Mathematics Addition and Subtraction 1 - Geniebook   ## Topic Recap:

### Addition Within 100 Without Renaming

Example:

Jerry went to an arcade. He won 38 tickets from his first game and 21 tickets from his second game. How many tickets did he win altogether from the 2 games?

Solution:

$$38 + 21 = 59$$ 59 tickets

Question 1

1. 25
2. 26
3. 73
4. 75

Solution:

$$50 + 25 = 75$$ (4) 75

Example:

There are 453 boys and 216 girls in a school. How many boys and girls are there in the school altogether?

Solution:

$$453 + 216 = 669$$ 669 boys and girls

Question 1

1. 254
2. 608
3. 658
4. 659

Solution:

$$402 + 256 = 658$$ (3) 658

Question 2:

1. 767
2. 777
3. 778
4. 779

Solution:

$$654 + 123 = 777$$ (2) 777

## Topic Recap:

### Addition Within 100 With Renaming

Example:

Kenny collects stamps. He has 67 foreign stamps and 28 local stamps. How many stamps does he have altogether?

Solution:

$$67 + 28 = 95$$ 95 stamps

Question 2:

1. 73
2. 74
3. 83
4. 84

Solution:

$$39 + 45 = 84$$ (4) 84

Example:

There are 378 adults and 414 children in the estate. How many people are there in the estate altogether?

Solution:

$$378 + 414 = 792$$ 792 people

Question 1:

1. 703
2. 803
3. 813
4. 913

Solution:

$$316 + 497 = 813$$ (3) 813

Question 2:

The sum of 237 and 508 is __________.

1. 733
2. 735
3. 743
4. 745

Solution:

$$237 + 508 = 745$$ (4) 745

Question 3:

Use the numbers below to form an addition sentence. You can use numbers more than once. Solution: $$115 + 65 = 180$$

Question 4:

$$280 + 120 =$$ __________ tens

1. 30
2. 40
3. 300
4. 400

Solution:

$$280 + 120 = 400$$ $$400 = 40$$ tens

(2) 40

Question 5:

$$278 + 222 =$$ __________ hundreds

1. 5
2. 40
3. 50
4. 4

Solution:

$$278 + 222 = 500$$ $$500 = 50$$ tens

(1) 5

Question 6:

Fill in the blank with the correct answer: 1. 46
2. 232
3. 837
4. 847

Solution:

23 tens 2 ones

\begin{align}​​ &= 230 + 2 \\[2ex] &= 232 \end{align}

6 hundreds 15 ones $$= 615$$

$$232 + 615 = 847$$ (4) 847

Question 7:

Fill in the blanks with the correct answer: 1. 7
2. 70
3. 700
4. 709

Solution:

39 tens 18 ones

\begin{align}​​ &= 390 + 18\\[2ex] &= 408 \end{align}

27 tens 31 ones

\begin{align}​​ &= 270 + 31\\[2ex] &= 301 \end{align}

$$408+301=709$$ (4) 709

Question 8:

What is the missing digit in the box? 1. 0
2. 8
3. 9
4. 4

Solution: (3) 9

Question 9

Kate added two of the numbers below and got the answer 108. Which two numbers did she add? 1. A and C
2. A and B
3. B and C
4. B and D

Solution:

Let’s calculate the options.

1. $$69 + 49 = 118$$
2. $$69 + 59 = 128$$
3. $$59 + 49 = 108$$
4. $$59 + 19 = 78$$

(3) B and C

## Conclusion

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Numbers To 1000 Multiplication And Division 1
Multiplication And Division 2 Addition And Subtraction 1
Addition And Subtraction 2 Fractions 1
Length 1 Mass 1
Volume 1 Money 1
Time 1 Shapes And Patterns
Picture Graphs 1 Model Drawing 1
Model Drawing 4  Primary  Primary 1  Primary 2  English  Maths
Numbers To 1000
Multiplication And Division 1
Multiplication And Division 2
Fractions 1
Length 1
Mass 1
Volume 1
Money 1
Time 1
Shapes And Patterns
Picture Graphs 1
Model Drawing 1
Model Drawing 4  Primary 3  Primary 4  Primary 5  Primary 6  Secondary  Secondary 1  Secondary 2  Secondary 3  Secondary 4      