Examples with solutions for Addition, Subtraction, Multiplication and Division: 3 Numbers

Exercise #1

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 #2

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 #3

Solve the following expression:

10×2:4= ? 10\times2:4=\text{ ?}

Video Solution

Step-by-Step Solution

The division and multiplication have the same priority according to the order of operations, therefore we solve it from left to right:

102=20 10\cdot2=20

20/4=5 20/4=5

Answer

5

Exercise #4

113:4= 11-3:4=

Video Solution

Step-by-Step Solution

According to the order of operations rules, we must first solve the division problem, and subsequently the subtraction problem:

3:4=34 3:4=\frac{3}{4}

1134=1014 11-\frac{3}{4}=10\frac{1}{4}

Answer

1014 10\frac{1}{4}

Exercise #5

30:5×2= 30:5\times2=

Video Solution

Step-by-Step Solution

According to the rules of the order of operations, the exercise which contains both multiplication and division should be solved from left to right.

30:5=6 30:5=6

6×2=12 6\times2=12

Answer

12

Exercise #6

What is the result of the following equation?

364÷2 36-4\div2

Video Solution

Step-by-Step Solution

The given equation is 364÷2 36 - 4 \div 2 . To solve this, we must follow the order of operations, often remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)).


Step 1: Division

  • Identify the division operation in the equation: 4÷2 4 \div 2 .

  • Perform the division: 4÷2=2 4 \div 2 = 2 .


Now the equation becomes: 362 36 - 2 .


Step 2: Subtraction

  • Perform the subtraction: 362=34 36 - 2 = 34 .

Therefore, the result of the equation 364÷2 36 - 4 \div 2 is 34 34 .

Answer

34