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Addition And Subtraction 1

In this article, we will learn about Addition and Subtraction. The learning objectives are:

  1. Addition without renaming
  2. Addition with renaming

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:

\(38 + 21 = 59\)

\( \begin{matrix} & 3 & 8\\ + & 2 & 1\\ \hline & 5 & 9\\ \hline \end{matrix}\)

Answer: 

59 tickets

 

Question 1: 

Add 50 to 25.  

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

Solution:

\(50 + 25 = 75\)

\( \begin{matrix} & 5 & 0\\ + & 2 & 5\\ \hline & 7 & 5\\ \hline \end{matrix}\)

Answer: 

(4) 75

1. Addition without renaming

Example:

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

Solution:

\(453 + 216 = 669\)

\( \begin{matrix} & 4 & 5 & 3\\ + & 2 & 1 & 6\\ \hline & 6 & 6 & 9\\ \hline \end{matrix}\)

Answer: 

669 boys and girls.

 

Question 1: 

Add 402 to 256.

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

Solution:

\(402 + 256 = 658\)

\( \begin{matrix} & 4 & 0 & 2\\ + & 2 & 5 & 6\\ \hline & 6 & 5 & 8\\ \hline \end{matrix}\)

Answer: 

(3) 658

 

Question 2:

Add 654 to 123.

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

Solution:

\(654 + 123 = 777\)

\( \begin{matrix} & 6 & 5 & 4\\ + & 1 & 2 & 3\\ \hline & 7 & 7 & 7\\ \hline \end{matrix}\)

Answer:

(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: 

\(67 + 28 = 95\)

\( \begin{matrix} & \overset{1}{6} & 7 \\ + & 2 & 8 \\ \hline & 9 & 5 \\ \hline \end{matrix}\)

Answer:

95 stamps

 

Question 1: 

Add 39 to 45.

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

Solution: 

\(39 + 45 = 84\)

\( \begin{matrix} & \overset{1}{3} & 9 \\ + & 4 & 5 \\ \hline & 8 & 4 \\ \hline \end{matrix}\)

Answer:

(4) 84

2. Addition with renaming

Example: 

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

Solution: 

\(378 + 414 = 792\)

\(\begin{matrix} & 3 & \overset{1}{7} & 8\\ + & 4 & 1 & 4\\ \hline & 7 & 9 & 2\\ \hline \end{matrix}\)

Answer: 

792 people

 

Question 1: 

Add 316 to 497.

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

Solution:

\(316 + 497 = 813\)

\(\begin{matrix} & \overset{1}{3} & \overset{1}{1} & 6\\ + & 4 & 9 & 7\\ \hline & 8 & 1 & 3\\ \hline \end{matrix}\)

Answer: 

(3) 813

 

Question 2:

The sum of 237 and 508 is __________.

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

Solution:

\(237 + 508 = 745\)

\(\begin{matrix} & 2 & \overset{1}{3} & 7\\ + & 5 & 0 & 8\\ \hline & 7 & 4 & 5\\ \hline \end{matrix}\)

Answer:

(4) 745 

 

Question 3:

Use the numbers below to form an addition sentence. You can use numbers more than once. 


\(\bbox[border:1px solid #27aae1] { \bbox[#27aae1,15px,border:2px solid white] { \color{white}{\text{245} \qquad\qquad \text{115} \qquad\qquad \text{180} \qquad\qquad \text{65}} } }\)
 

Solution:

\(\begin{matrix} & 1 & \overset{1}{1} & 5\\ + & & 6 & 5\\ \hline & 1 & 8 & 0\\ \hline \end{matrix}\)

Answer: 

\(115 + 65 = 180\)

 

Question 4:

\(280 + 120 =\) __________ tens

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

Solution:

\(280 + 120 = 400\)

\(\begin{matrix} & \overset{1}{2} & 8 & 0\\ + & 1 & 2 & 0\\ \hline & 4 & 0 & 0\\ \hline \end{matrix}\)

\(400 = 40\) tens

Answer: 

(2) 40

 

Question 5:

\(278 + 222 =\) __________ hundreds

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

Solution:

\(278 + 222 = 500\)

\(\begin{matrix} & \overset{1}{2} & \overset{1}{7} & 8\\ + & 2 & 2 & 2\\ \hline & 5 & 0 & 0\\ \hline \end{matrix}\)

\(500 = 5\) hundreds.

Answer: 

(1) 5

 

Question 6:

Fill in the blank with the correct answer:
\(\bbox[border:1px solid #27aae1] { \bbox[#27aae1,15px,border:2px solid white] { \color{white}{\text{23 tens 2 ones + 6 hundreds 15 ones = __________}} } }\)

  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

\(\begin{align} &= 600 + 15 \\[2ex] &= 615  \end{align}\)

Therefore,

\(232 + 615 = 847\)

\(\begin{matrix}  & 2 & 3 & 2\\  + & 6 & 1 & 5\\  \hline & 8 & 4 & 7\\ \hline  \end{matrix}\)

Answer:

(4) 847

 

Question 7: 

Fill in the blanks with the correct answer:
\(\bbox[border:1px solid #27aae1] { \bbox[#27aae1,15px,border:2px solid white] { \color{white}{\text{39 tens 18 ones + 27 tens 31 ones = __________ tens 9 ones}} } }\)

  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

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

Therefore,

\(408+301=709\)

\(\begin{matrix}  & 4 & 0 & 8\\  + & 3 & 0 & 1\\  \hline & 7 & 0 & 9\\ \hline  \end{matrix}\)

Answer:

(4) 709

 

Question 8:

What is the missing digit in the box?

\(\begin{matrix}  & 6 & 5 & 6\\  + & 2 & ^\bbox[8px,border:2px solid red]{} & 8\\  \hline & 9 & 5 & 4\\ \hline  \end{matrix}\)

  1. 0
  2. 8
  3. 9
  4. 4

Solution:

\(\begin{matrix}  & 6 & \overset{1}{5} & 6\\  + & 2 & \bbox[8px,border:2px solid red]{9} & 8\\  \hline & 9 & 5 & 4\\ \hline  \end{matrix}\)

Answer: 

(3) 9

 

Question 9: 

Kate added two of the numbers below and got the answer 108. Which two numbers did she add?

Kate added two of the numbers and got the answer 108

  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. \(59 + 19 = 78\)

Answer: 

(3) B and C

Conclusion

In this article, we have learnt Addition and Subtraction:

  • Addition without renaming
  • Addition with renaming
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