We have hundreds of course questions with personalized recommendations + Account 100% premium
First, subtract 29 from 78: .
Next, subtract 19: .
The final answer is .
Solve the following equation:
\( 12+7-5\text{ }= \)
Because subtraction is not commutative like addition! The order matters. 78 - 29 - 19 means start with 78, subtract 29, then subtract 19 from that result.
Yes! You can think of it as 78 - (29 + 19) = 78 - 48 = 30. This works because subtracting two amounts is the same as subtracting their sum.
Add everything back together! Start with your answer and add the numbers you subtracted: 30 + 19 + 29 = 78. If you get the original number, you're right!
That means you're subtracting more than you started with. Double-check your calculations - you might have made an error in borrowing or place value.
Yes! Round to make easier numbers: 78 - 30 - 20 = 28, then add back the extra amounts you subtracted: 28 + 1 + 1 = 30.
Get unlimited access to all 18 Order of operations for beginners questions, detailed video solutions, and personalized progress tracking.
Unlimited Video Solutions
Step-by-step explanations for every problem
Progress Analytics
Track your mastery across all topics
Ad-Free Learning
Focus on math without distractions
No credit card required • Cancel anytime