NVO Grade 4 Mathematics flashcards
NVO Grade 4 Mathematics · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Product
- The answer to a multiplication problem. In 7 × 8 = 56, the product is 56, which equals seven groups of eight items counted together.
- Quotient
- The answer to a division problem. In 42 ÷ 6 = 7, the quotient is 7, meaning 42 objects split into 6 equal groups give 7 objects per group.
- Remainder
- The amount left over after dividing into equal whole groups. In 29 ÷ 5 = 5 remainder 4, the remainder 4 is always less than the divisor 5.
- Factor pairs
- Two whole numbers that multiply to give a product. The factor pairs of 12 are 1 and 12, 2 and 6, and 3 and 4, giving 12 exactly six factors.
- Multiplicative comparison
- A statement comparing amounts using multiplication, such as 'Sam has 4 times as many marbles as Ana.' If Ana has 6, then Sam has 4 × 6 = 24 marbles.
- Number pattern rule
- The operation that changes one term to the next in a sequence. In 5, 10, 20, 40 the rule is multiply by 2; in 3, 8, 13 it is add 5.
- Equation with unknown
- A number sentence containing a letter or blank for an unknown value. In 6 × n = 54, dividing both sides by 6 gives n = 9.
- Place value
- The value of a digit determined by its position. In 5,382 the digit 3 sits in the hundreds place, so its value is 3 × 100 = 300.
- Expanded form
- A way of writing a number as the sum of each digit's place value. The number 60,407 in expanded form is 60,000 + 400 + 7.
- Rounding
- Replacing a number with a nearby number of a given place value. Look at the digit to the right; 5 or more rounds up, 4 or less stays the same.
- Regrouping
- Trading 10 units in one place for 1 unit in the next place to the left, or the reverse. It is used when adding, subtracting, multiplying, or dividing multi-digit numbers.
- Partial products
- The separate products found by multiplying each place value of a multi-digit number by a one-digit number. For 4 × 312 they are 1,200, 40, and 8, totaling 1,248.
- Comparing multi-digit numbers
- Deciding which of two numbers is greater by comparing digits from the leftmost place. The first place where the digits differ determines the result.
- Divisibility by 2 and 5
- A whole number is divisible by 2 if its ones digit is 0, 2, 4, 6, or 8, and divisible by 5 if its ones digit is 0 or 5.
- Numerator
- The top number of a fraction. It tells how many equal parts are being counted or described, as the 3 in 3/4 counts three of four equal parts.
- Denominator
- The bottom number of a fraction. It tells how many equal parts the whole is divided into, so a denominator of 8 means the whole is cut into eight equal pieces.
- Equivalent fractions
- Fractions that name the same amount. Multiplying or dividing numerator and denominator by the same nonzero number gives an equivalent fraction, such as 2/3 = 4/6.
- Benchmark fraction
- A familiar fraction such as 1/4, 1/2, or 3/4 used to estimate size. A fraction is near 1/2 when its numerator is about half its denominator.
- Common denominator
- A shared denominator used to add or subtract fractions with unlike denominators. For 1/2 + 1/3, the common denominator 6 gives 3/6 + 2/6 = 5/6.
- Mixed number
- A number made of a whole number and a fraction, such as 3 1/2. It can be rewritten as an improper fraction: 3 1/2 equals 7/2.
- Improper fraction
- A fraction whose numerator is greater than or equal to its denominator, such as 9/4. Its value is at least 1 and it can be rewritten as a mixed number.
- Unit fraction
- A fraction with numerator 1, such as 1/5 or 1/8. Any fraction is a sum of unit fractions: 3/5 = 1/5 + 1/5 + 1/5.
- Perimeter
- The distance around a closed figure, found by adding all side lengths. For a rectangle it equals 2 × (length + width) and is measured in linear units.
- Area
- The number of square units needed to cover a flat figure. For a rectangle, area equals length × width, so a 4 by 6 rectangle has area 24 square units.
- Elapsed time
- The amount of time between a start and an end time. From 9:40 a.m. to 11:15 a.m. is 1 hour 35 minutes, found by counting forward.
- Line plot
- A graph showing data as X marks above a number line. Each X stands for one measurement, and stacked X marks show how often a value occurs.
- Unit conversion
- Changing a measurement from one unit to another using a known relationship. Multiply when converting to a smaller unit and divide when converting to a larger unit.
- Angle measure
- The size of the opening between two rays, measured in degrees with a protractor. A right angle measures 90° and a straight angle measures 180°.
- Line of symmetry
- A line that folds a figure into two matching halves. A square has 4 lines of symmetry and a rectangle has 2.
- Parallel lines
- Two lines in the same plane that never intersect, no matter how far they are extended. The opposite sides of a rectangle are parallel.
- Perpendicular lines
- Two lines that meet or cross at exactly a right angle, forming a 90° angle. The two shorter sides of a right triangle are perpendicular.
- Right triangle
- A triangle containing exactly one 90° angle. The two sides that form the right angle are perpendicular, and the side opposite it is the longest.