Mathematics - Number Sense Flashcards

6 cards from real CHSPE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Mathematics - Number Sense flashcards as text

What is 15% of 240?
Answer: 36
15% of 240 = 0.15 × 240 = 36.
Which of the following is an irrational number?
Answer: √2
√2 cannot be expressed as a fraction and its decimal never repeats or terminates, making it irrational.
A store discounts a $80 jacket by 25%. What is the sale price?
Answer: $60
25% of $80 = $20 discount; $80 − $20 = $60.
What is the least common multiple (LCM) of 4 and 6?
Answer: 12
The smallest number divisible by both 4 and 6 is 12.
Order these from least to greatest: 0.6, 3/5, 58%, 0.605
Answer: 58%, 3/5, 0.6, 0.605
Converting all to decimals: 58%=0.58, 3/5=0.60, 0.6=0.60, 0.605; order is 0.58 < 0.60 = 0.60 < 0.605.
Which expression equals −3²?
Answer: −9
−3² means −(3²) = −9 because the exponent applies only to 3, not the negative sign.