Solve the Number Sequence: 21-3-6+9-5 Step by Step

Question

$21-3-6+9-5=$

00:00 We'll use the associative law and combine the subtraction terms into one term

00:11 We'll use the associative law again to cancel out two numbers from the exercise

00:21 We're left with a simple subtraction exercise

00:24 And that's the solution!

Due to the fact that the exercise only involves addition and subtraction operations, we will solve it from left to right:

$21-3=18$

$18-6=12$

$12+9=21$

$21-5=16$

$16$