1. method of mental computation? 2. method of property of multiplication over addition?3. method of using diagonal columns?
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1. method of mental computation? 2. method of property of multiplication over addition?3. method of using diagonal columns?
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Answer:
method of mental computation?
1.The "9-trick". To add 9 to any number, first add 10, and then subtract 1.
2.Doubles + 1.
3.Use addition facts when adding bigger numbers.
4.Subtract by adding.
5.Five times a number.
6.Four and eight times a number.
7.Multiply in parts.
method of property of multiplication over addition?
you can use distributive property of multiplication
method of using diagonal columns?
Finding squares I'm not sure
correct me if I am wrong
Pa brainliest po