In mental math calculations, operations must be performed in a specific order: parentheses first, then multiplication and division from left to right, and finally addition and subtraction from left to right. For example, in the expression 6 ÷ 2 × (1 + 2), you must first solve the parentheses (1 + 2 = 3), then perform division and multiplication from left to right (6 ÷ 2 = 3, then 3 × 3 = 9). This rule ensures consistent and correct results in all mathematical expressions.
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Prerequisite Knowledge
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Deep Dive
Can You Pass This Maths Quiz? 🤓➗ Easy to impossible Maths ChallengeAdded:
Welcome back to Quiz Owly. Think your math skills are sharp? Let's test it with 40 mental math challenges. Please subscribe to the channel before starting. Ready? Let's go.
Let's start with the easy round.
What is 15 plus 25?
It's 40.
What do you get when you subtract 15 from 50?
Think fast.
It's 35. Nice and easy subtraction.
What is six multiplied by five?
It's 30.
How about 20 divided by four?
Got it?
It's five because four times five is 20.
What is 10 multiplied by 10?
It's 100.
What do you get if you add 100 to 200?
Think quick.
It's 300.
What is 8 * 8?
It's 64.
What is 50 / 2?
Easy, right?
It's 25.
What is 7 + 8?
It's 15.
What do you get when you subtract 50 from 100?
No cheating.
It's 50.
Now it's time for the medium round.
What is 3 + 2 * 5?
It's 13. Remember, you must multiply before you add.
What is 50% of 100?
Let's see.
It's 50.
What is 11 * 5?
>> It's 55.
What is 100 - 20 / 2?
Got this?
It's 90. Division always comes first here.
What is 5 squared?
It's 25.
What is 10% of 200?
No guessing.
It's 20.
What is 20 * 4?
It's 80.
What is 40 / 2 + 5?
Think fast.
It's 25. Do the division first.
What is 1/2 of 140?
It's 70.
What do you get when you add 25, 25, and 25?
Got it?
It's 75.
Be careful. It's time for the hard round.
What is 20% of 150?
It's 30. Just find 10% and then double it.
What is 14 * 5?
Think quick.
It's 70.
What is the square root of 144?
It's 12.
What is 50 - 12 / 4?
Easy, right?
It's 47. Division always happens first.
What is 3/4 of 100?
It's 75.
What is 11 * 12?
No cheating.
It's 132.
What is 1,000 / 8?
It's 125.
Just cut the number in half three times.
What is 5 squared + 10?
Let's see.
It's 35.
What is 30% of 200?
It's 60.
What is 15 * 6?
Got this?
It's 90.
Now, [snorts] it's time for the impossible round.
What is 6 / 2 * the sum of 1 + 2?
It's nine. Solve the parentheses first, then work left to right.
What is 4 cubed?
No guessing.
It's 64.
What is 10 + 10 * 0 + 10 It's 20.
What is 120 / 1/2?
Think fast.
It's 240.
>> [snorts] >> What is the square root of 100 * the square root of 16?
It's 40.
What is 15 squared?
Got it?
It's 225.
What is 25% of 440?
It's 110.
What is 5% of 1,200?
Think quick.
It's 60.
What is 99 + 99 + 2?
It's 200.
What is 7 squared minus 4 squared?
Easy, right?
It's 33.
Congrats on completing the challenge.
How did you do on all the levels? Let me know your score in the comments. Don't forget to test your brain on our other quizzes. See you there.
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