Solve the Expression: 1+2×3-7÷4 Using Order of Operations

Question

1+2×37:4= 1+2\times3-7:4=

Video Solution

Solution Steps

00:00 Multiplication and division come before addition and subtraction, so we'll start with them
00:12 Let's solve the parts we marked
00:21 Addition and subtraction are at the same level, so we solve from left to right
00:36 Let's break down the fraction using the distributive law
00:49 We'll continue the same way and split into two different fractions
00:56 When the numerator and denominator are equal, the fraction equals 1
01:07 We succeeded in converting the fraction to a mixed number
01:11 Let's perform a simple subtraction exercise
01:13 And that's the solution!

Step-by-Step Solution

According to the rules of the order of arithmetic operations, we must first enclose both the multiplication and division exercises inside of parentheses:

1+(2×3)(7:4)= 1+(2\times3)-(7:4)=

We then solve the exercises within the parentheses:

2×3=6 2\times3=6

7:4=74 7:4=\frac{7}{4}

We obtain the following:

1+674= 1+6-\frac{7}{4}=

We continue by solving the exercise from left to right:

1+6=7 1+6=7

774= 7-\frac{7}{4}=

Lastly we break down the numerator of the fraction with a sum exercise as seen below:

7(4+34) 7-(\frac{4+3}{4})

7(44+34) 7-(\frac{4}{4}+\frac{3}{4})

7(1+34) 7-(1+\frac{3}{4})

7134=514 7-1\frac{3}{4}=5\frac{1}{4}

Answer

514 5\frac{1}{4}