The key to multiplying or dividing difficult numbers is simplification. Example: Multiply 14 by 17 - To solve, simplify it: 14 x 17 = (14 x 10) + (14 x 7) = 140 + 98 = 238 More tips: To multiply by 11, first multiply by 10, then add the original number To multiply by 9, first multiply by 10, then subtract the original number To divide by 5, first multiply by 2 and then move the digits to the right To divide by 25, divide by 100, then multiply by 4 Related Tests: 11 Plus (11+) Maths Practice Test: Multiplication and Division (Very Easy) 11 Plus (11+) Maths Practice Test:... Show more The key to multiplying or dividing difficult numbers is simplification. Example: Multiply 14 by 17 - To solve, simplify it: 14 x 17 = (14 x 10) + (14 x 7) = 140 + 98 = 238 More tips: To multiply by 11, first multiply by 10, then add the original number To multiply by 9, first multiply by 10, then subtract the original number To divide by 5, first multiply by 2 and then move the digits to the right To divide by 25, divide by 100, then multiply by 4 Related Tests: 11 Plus (11+) Maths Practice Test: Multiplication and Division (Very Easy) 11 Plus (11+) Maths Practice Test: Multiplication and Division (Easy) Show less
The key to multiplying or dividing difficult numbers is simplification.
Example: Multiply 14 by 17 - To solve, simplify it: 14 x 17 = (14 x 10) + (14 x 7) = 140 + 98 = 238
More tips:
To multiply by 11, first multiply by 10, then add the original number
To multiply by 9, first multiply by 10, then subtract the original number
To divide by 5, first multiply by 2 and then move the digits to the right
To divide by 25, divide by 100, then multiply by 4
Related Tests:
11 Plus (11+) Maths Practice Test: Multiplication and Division (Very Easy)
11 Plus (11+) Maths Practice Test: Multiplication and Division (Easy)
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