Examples with solutions for Addition and subtraction: 3 Numbers

Exercise #1

3+21= 3+2-1=

Video Solution

Step-by-Step Solution

According to the rules of the order of operations, given that the exercise only involves subtraction and addition operations, we solve the exercise from left to right:

3+2=5 3+2=5

51=4 5-1=4

Answer

4 4

Exercise #2

9+31= 9+3-1=

Video Solution

Step-by-Step Solution

According to the rules of the order of arithmetic operations, we will work to solve the exercise from left to right:

9+3=11

11-1=10

 

And this is the solution!

Answer

11 11

Exercise #3

Solve the following equation:

12+75 = 12+7-5\text{ }=

Video Solution

Step-by-Step Solution

To solve the expression 12+7512 + 7 - 5, follow these steps:

  1. Add the first two numbers: 12+7=1912 + 7 = 19.
  2. Subtract the third number: 195=1419 - 5 = 14.
Therefore, the final answer is 1414.

Answer

14

Exercise #4

Solve:

15+86 = 15+8-6\text{ }=

Video Solution

Step-by-Step Solution

To solve 15+86 15+8-6 follow these steps:

1. 15+8=23 15 + 8 = 23 .

2. 236=17 23 - 6 = 17 .

So the answer is 17 17 .

Answer

17

Exercise #5

Solve:

10+53 = 10+5-3\text{ }=

Video Solution

Step-by-Step Solution

To solve 10+53 10+5-3 follow these steps:

1. 10+5=15 10 + 5 = 15

2. 153=12 15 - 3 = 12

So the answer is 12 12 .

Answer

12

Exercise #6

Solve:

8+64 = 8+6-4\text{ }=

Video Solution

Step-by-Step Solution

To solve 8+64 8+6-4 follow these steps:

1. 8+6=14 8 + 6 = 14

2. 144=10 14 - 4 = 10

So the answer is 10 10 .

Answer

10

Exercise #7

7+52= ? 7+5-2=\text{ ?}

Video Solution

Step-by-Step Solution

First, add 7 and 5 to get 12.

7+5=127 + 5 = 12

Then, subtract 2 from 12 to get 10.

122=1012 - 2 = 10

Answer

1010

Exercise #8

154+3= ? 15-4+3=\text{ ?}

Video Solution

Step-by-Step Solution

First, subtract 4 from 15 to get 11.

154=1115 - 4 = 11

Then, add 3 to 11 to get 14.

11+3=1411 + 3 = 14

Answer

14 14

Exercise #9

86+4= ? 8-6+4=\text{ ?}

Video Solution

Step-by-Step Solution

First, subtract 6 from 8 to get 2.

86=28 - 6 = 2

Then, add 4 to 2 to get 6.

2+4=62 + 4 = 6

Answer

66

Exercise #10

5+93= ? 5+9-3=\text{ ?}

Video Solution

Step-by-Step Solution

First, add 5 and 9 to get 14.

5+9=145 + 9 = 14

Then, subtract 3 from 14 to get 11.

143=1114 - 3 = 11

Answer

1111

Exercise #11

7+24= ? 7+2-4=\text{ ?}

Video Solution

Step-by-Step Solution

First, we perform the addition: 7+2=9 7 + 2 = 9 .

Next, we do the subtraction: 94=5 9 - 4 = 5 .

Hence, the answer is 5 5 .

Answer

5 5

Exercise #12

6+58= ? 6+5-8=\text{ ?}

Video Solution

Step-by-Step Solution

Add first: 6+5=11 6 + 5 = 11 .

Then, subtract: 118=3 11 - 8 = 3 .

The correct answer is 3 3 .

Answer

3 3

Exercise #13

10+17= ? 10+1-7=\text{ ?}

Video Solution

Step-by-Step Solution

Start by adding: 10+1=11 10 + 1 = 11 .

Finally, subtract: 117=4 11 - 7 = 4 .

The solution is 4 4 .

Answer

4 4

Exercise #14

9+35= ? 9+3-5=\text{ ?}

Video Solution

Step-by-Step Solution

To solve 9+359 + 3 - 5:

  1. Start with the addition: 9+3=129 + 3 = 12
  2. Then perform the subtraction: 125=712 - 5 = 7
  3. Therefore, the final answer is 77.

Answer

7 7

Exercise #15

72+6= ? 7-2+6=\text{ ?}

Video Solution

Step-by-Step Solution

To solve 72+67 - 2 + 6:

  1. Begin with the subtraction: 72=57 - 2 = 5
  2. Then add the result to 6: 5+6=115 + 6 = 11
  3. Thus, the correct answer is 1111.

Answer

11 11

Exercise #16

5+3+2= ? 5+3+2=\text{ ?}

Video Solution

Step-by-Step Solution

To solve 5+3+25 + 3 + 2, you follow these steps:

First, add the first two numbers: 5+3=85 + 3 = 8.

Then, add the result to the last number: 8+2=108 + 2 = 10.

Therefore, the final result is 1010.

Answer

1010

Exercise #17

7+42= ? 7+4-2=\text{ ?}

Video Solution

Step-by-Step Solution

To solve the expression 7+427 + 4 - 2, follow these steps:

  1. Add the first two numbers: 7+4=117 + 4 = 11
  2. Subtract the third number from the result: 112=911 - 2 = 9

Thus, the answer is 99.

Answer

9 9

Exercise #18

63+8= ? 6-3+8=\text{ ?}

Video Solution

Step-by-Step Solution

To solve the expression 63+86 - 3 + 8, first perform the subtraction and then the addition:

  1. Subtract the first two numbers: 63=36 - 3 = 3
  2. Add the result to the third number: 3+8=113 + 8 = 11

Thus, the answer is 1111.

Answer

1111

Exercise #19

4+7+6=4 + 7 + 6 =

Video Solution

Step-by-Step Solution

To solve this question, we will add the numbers step by step:

4+7=114 + 7 = 11

Now, add the result to the next number in the sequence:

11+6=1711 + 6 = 17

Therefore, the answer is 1717.

Answer

17 17

Exercise #20

9+2+5=9 + 2 + 5 =

Video Solution

Step-by-Step Solution

To solve this question, start by adding the first two numbers:

9+2=119 + 2 = 11

Then add the result to the last number:

11+5=1611 + 5 = 16

Therefore, the answer is 1616.

Answer

16 16