24 videos in "Computation Shortcuts"
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Ex 1 - Multiplying numbers with 25
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Ex 2 - Multiplying numbers with 25
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Ex 3 - Multiplying numbers with 25
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Ex 1 - Multiplying numbers with 11
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Ex 2 - Multiplying numbers with 11
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Ex 3 - Multiplying numbers with 11
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Ex 1 - Multiplying numbers with 5
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Ex 2 - Multiplying numbers with 5
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Ex 3 - Multiplying numbers with 5
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Ex 1 - Multiplying numbers using Line Intersection
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Ex 2 - Multiplying numbers using Line Intersection
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Ex 3 - Multiplying numbers using Line Intersection
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Ex 1 - Dividing numbers by 25
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Ex 2 - Dividing numbers by 25
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Ex 3 - Dividing numbers by 25
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Ex 1 - Dividing numbers by 5
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Ex 2 - Dividing numbers by 5
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Ex 3 - Dividing numbers by 5
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Ex 1 - Subtracting from multiples of 10
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Ex 2 - Subtracting from multiples of 10
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Ex 3 - Subtracting from multiples of 10
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Ex 1 - Squaring numbers ending with 5
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Ex 2 - Squaring numbers ending with 5
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Ex 3 - Squaring numbers ending with 5
Ex 3 - Multiplying numbers with 25
Meets these NCTM Standards:
- How do you multiply a number by 25?
- Is there a quick and easy shortcut or trick for multiplying numbers by 25?
- How can you find 98989 * 25 quickly?
This video shows a good and useful method for multiplying a number by 25. Great for quick mental math computations.
