Common Math Mistakes

Which is greater: -5 or -2?

• -5
• Cannot tell
• -2
• They are equal

Fractions can only be added when they share a common ____.

• numerator
• multiple
• factor
• denominator

What is 1/2 + 1/3?

• 2/6
• 3/5
• 2/5
• 5/6

A larger denominator always means a larger fraction.

• True
• False

What is 2 + 3 × 4?

• 20
• 14
• 24
• 9

PEMDAS stands for parentheses, exponents, ____, addition and subtraction.

• exponents twice
• addition first
• multiplication and division
• division only

Multiplying a number always makes it bigger.

• True
• False

What is 10 ÷ 0.5?

• 5
• 20
• 2
• 0.5

The equals sign means both sides are the ____.

• answer
• different
• same
• larger

In 8 + 4 = ? + 5, what goes in the blank?

• 12
• 7
• 5
• 17

What is 50% of 80?

• 20
• 40
• 130
• 50

A 20% increase then a 20% decrease returns to the start.

• True
• False

____ measures the space inside a shape, given in square units.

• Area
• Volume
• Perimeter
• Angle

Perimeter measures the distance around a shape.

• True
• False

On a number line, numbers get smaller as you move left.

• True
• False