Area +Perimeter Poster (Gr. 3)
Grade 2 – Development of computational fluency in addition and subtraction with numbers to 100 requires an understanding of place value
Adding & Subtracting Double Digits with Regrouping
Video: Subtraction with Regrouping
Grade 3 – Development of computational fluency in addition, subtraction, multiplication and division of whole numbers requires flexible decomposing and composing
Video: Subtracting with regrouping across zeros
Multiplication: Learning this concept involves understanding of repeated addition and arrays. What is an array? It is arranging a number objects in equal groups or in equal rows and columns.
3 x 4 = 12 5 x 6 = 30
When multiplying numbers, we can use repeated addition to find the answer or product.
Videos:
https://www.youtube.com/watch?v=MeidqzJNA2o
https://www.youtube.com/watch?v=QphXFi30aFk
Vocabulary: digit, add, subtract, sum, difference, compose & decompose; addend & minuend