24 videos in "Computation Shortcuts"
-
Ex 1 - Multiplying numbers with 25
-
Ex 2 - Multiplying numbers with 25
-
Ex 3 - Multiplying numbers with 25
-
Ex 1 - Multiplying numbers with 11
-
Ex 2 - Multiplying numbers with 11
-
Ex 3 - Multiplying numbers with 11
-
Ex 1 - Multiplying numbers with 5
-
Ex 2 - Multiplying numbers with 5
-
Ex 3 - Multiplying numbers with 5
-
Ex 1 - Multiplying numbers using Line Intersection
-
Ex 2 - Multiplying numbers using Line Intersection
-
Ex 3 - Multiplying numbers using Line Intersection
-
Ex 1 - Dividing numbers by 25
-
Ex 2 - Dividing numbers by 25
-
Ex 3 - Dividing numbers by 25
-
Ex 1 - Dividing numbers by 5
-
Ex 2 - Dividing numbers by 5
-
Ex 3 - Dividing numbers by 5
-
Ex 1 - Subtracting from multiples of 10
-
Ex 2 - Subtracting from multiples of 10
-
Ex 3 - Subtracting from multiples of 10
-
Ex 1 - Squaring numbers ending with 5
-
Ex 2 - Squaring numbers ending with 5
-
Ex 3 - Squaring numbers ending with 5
Ex 2 - Multiplying numbers with 11
Meets these NCTM Standards:
- How do you multiply a number by 11?
- Is there a quick and easy shortcut or trick for multiplying numbers by 11?
- How can you find 36249 * 11 quickly?
This video shows a good and useful method for multiplying a number by 11. Great for quick mental math computations. Some of the digits don't show up in the computation, but the final answer is correct.
