• # Algorithms

You might enjoy watching demonstrations for algorithms!

http://mb.msdpt.k12.in.us/Math/Algorithms.html

The new Common Core of Mathematics includes using the standard (traditional) algorithms in specific grade levels. The chart below lists the standard algorithms as listed in the Common Core. We will continue to model and practice many methods during the math lessons, but the traditional algorithm will be added.

Standard Algorithm in Common Core

3

None (thus, any method can be used)

4

5

Multiplication

6

Division

Strategies students may use to attain fluency include:

Multiplication by zeros and ones

Doubles (2s facts), Doubling twice (4s), Doubling three times (8s)

Tens facts (relating to place value, 5 x 10 is 5 tens or 50)

Five facts (half of tens)

Skip counting (counting groups of __ and knowing how many groups have been counted)

Square numbers (ex: 3 x 3)

Nines (10 groups less one group, e.g., 9 x 3 is 10 groups of 3 minus one group of 3)

Decomposing into known facts (6 x 7 is 6 x 6 plus one more group of 6)

Turn-around facts (Commutative Property)

Fact families (Ex: 6 x 4 = 24; 24 ÷ 6 = 4; 24 ÷ 4 = 6; 4 x 6 = 24)

Missing factors