NB Francophone G3 Math flashcards
NB Francophone G3 Math · 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.
- Hundreds digit
- The digit in the third place from the right. In 638, the 6 means 6 hundreds, or 600.
- Expanded form
- Writing a number as the sum of its place values, such as 472 = 400 + 70 + 2.
- Ascending order
- Arranging numbers from smallest to largest, for example 214, 241, 412, 421.
- Odd number
- A whole number whose ones digit is 1, 3, 5, 7, or 9, such as 47 or 305.
- Regrouping in addition
- Trading 10 ones for 1 ten or 10 tens for 1 hundred when a column sum reaches 10 or more.
- Inverse operations
- Operations that undo each other. Addition and subtraction are inverse, and so are multiplication and division.
- Commutative property
- The order of addends does not change the sum: 38 + 47 = 47 + 38. This does not hold for subtraction.
- Multiplication as groups
- A multiplication such as 4 × 6 means 4 equal groups of 6, giving a total of 24.
- Division as sharing
- Division such as 24 ÷ 4 finds how many groups of 4 fit in 24, which is 6.
- Mental math plus nine
- To add 9, add 10 and subtract 1: 46 + 9 = 46 + 10 − 1 = 55.
- Numerator
- The top number of a fraction. It tells how many equal parts of the whole are taken.
- Denominator
- The bottom number of a fraction. It tells the total number of equal parts in one whole.
- Unit fraction
- A fraction with numerator 1, such as 1/2, 1/3, 1/4, or 1/10. It names one equal part.
- Comparing fractions
- With the same denominator, the fraction with the larger numerator is greater: 3/4 is greater than 1/4.
- One tenth as decimal
- The fraction 1/10 is written as 0.1 in decimal notation. Three tenths is 0.3.
- Repeating pattern
- A pattern in which a core group repeats, such as A B B A B B, where the core is A B B.
- Growing pattern
- A pattern that increases by the same amount each step, such as 3, 6, 9, 12, which grows by 3.
- Pattern rule
- A statement of the starting value and the change, such as start at 5 and add 4 each time.
- Unknown in an equation
- The missing value that makes both sides equal. In □ + 7 = 15, the unknown is 8.
- Perimeter
- The total distance around a shape, found by adding all side lengths. A 5 cm by 3 cm rectangle has perimeter 16 cm.
- Kilogram
- A unit of mass equal to 1000 grams. It is used for heavier objects such as a bag of flour.
- Litre
- A unit of capacity equal to 1000 millilitres. It is used for larger amounts of liquid.
- Right angle
- An angle of exactly 90 degrees, like the corner of a square. Squares and rectangles have four of them.
- Line of symmetry
- A line that divides a shape into two halves that match exactly when folded along it.
- Vertex of a solid
- A corner of a 3-D object where edges meet. A cube has 8 vertices.
- Tally chart
- A way to record data with tally marks grouped in fives, so four marks plus a diagonal stroke means 5.
- Pictograph key
- A note telling what each symbol stands for, such as one symbol equals 2 books.
- Mode
- The value that appears most often in a data set. It shows the most common result.
- Certain event
- An event that must happen, with a probability of 1. Rolling a number from 1 to 6 on a cube is certain.
- Four-step problem solving
- Understand the problem, choose a plan, carry out the plan, and check the answer for reasonableness.
- Working backward
- A strategy that starts from the final result and reverses each operation to find the starting value.
- Estimating a sum
- Rounding numbers before adding, such as 198 + 305 rounded to 200 + 300, giving an estimate of 500.