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Addition
Addition: Definition: Is finding the total, or sum, by combining two or more numbers. HOW TO: 6 + 12 + 4 = 22 Khan Link: https://www.khanacademy.org/math/arithmetic/arith-review-add-subtract/arith-review-basic-add-subtract/v/basic-addition
Equations
DEFINITION: a statement that the values of two mathematical expressions are equal (indicated by the sign =). HOW TO: 5 + 2 = 7 4 + 3 = 5 + 2 Both equal 7 so this is called an equation. Everyday Use: Equations are used when determining if two things are equal.
Multiply
Multiply Definition: Mathematical operation performed on a pair of numbers in order to derive a third number called a product. For positive integers, multiplication consists of adding a number (the multiplicand) to itself a specified number of times. HOW TO: 7 x 3 = 7 + 7 + 7 = 21 2 x 1 = 2 3 x 6 = 3 + 3 + 3 + 3 + 3 + 3 = 18 Khan Link: https://www.khanacademy.org/math/arithmetic/arith-review-multiply-divide/arith-review-mult-intro/v/multiplication-as-groups-of-objects
Multiply Double Digits
MULTIPLY DOUBLE DIGITS Multiplying double digit numbers is a quick and easy process. The steps to multiplying double digit numbers are as followed: Multiply the number in the ones place of the bottom number by both digits of the top number. 15 x12<--ones place 30 Write a 0 in the units column below the first product. 15 x12 30 0<--units column Multiply the number in the tens place of the bottom number by both digits of the top number. 15 tens place--> x12 30 150 Add up the two products. 15 x12 30 +150 = 180 https://www.khanacademy.org/math/arithmetic/arith-review-multiply-divide/arith-review-multi-digit-mult/v/multiplying-2-digit-numbers