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Is The elimination method is useful when you can eliminate one of the variable terms from an equation by adding or subtracting another equation?
Yes, for solving simultaneous equations.
Why is integers useful?
Integers are whole numbers without decimals or fractions which are useful because calculations are easier to work out.
What is a Real life situation using LCM?
Adding or subtracting fractions requires the use of a common multiple. It is rare that the LEAST common multiple is required - it is useful to keep the numbers small and manageable.
What statement describes why scientific notation is useful?
It makes calculations with very large and small numbers easier by allowing the 10-factors to be multiplied or divided by adding or subtracting their indices. (The principle of logarithms.)
What is a quick common denominator?
When you're adding or subtracting fractions with different denominators, if you multiply the denominators that's your Quick Common Denominator. I'ts useful for denominators that don't have a low Least Common Factor.
The elimination method is useful when you can eliminate one of the variable terms from an equation by adding or subtracting another equation?
True
Why do you find LCM and HCF?
When simplifying fractions it's useful to know what is the HCF of the numerator and denominator is. When adding or subtracting fractions with different denominators it's useful to know what the LCM of them is.
When is it useful to find the LCM or GCF of two numbers to solve a problem?
When adding or subtracting fractions with different denominators and when reducing fractions to their lowest termsWhen adding or subtracting fractions with different denominators their lowest common multiple is needed and when reducing fractions to their lowest terms their greatest common factor is needed.
What is a real world situation where it is useful to know about factors and multiples?
When adding or subtracting fractions with different denominators and when reducing fractions to their lowest terms.
Is The elimination method is useful when you can eliminate one of the variable terms from an equation by adding or subtracting another equation?
Yes, for solving simultaneous equations.
When is it useful to find the least common multiple and greatest common factor of two or more numbers to solve a problem?
When you are simplifying fractions or adding and subtracting unlike fractions.
Why is integers useful?
Integers are whole numbers without decimals or fractions which are useful because calculations are easier to work out.
How is estimation helpful when adding and subtracting decimals?
It is difficult to answer the question because, for addition or subtraction, it is often easier to obtain the exact answer! If you line up the decimal points and then follow the rules of addition or subtraction - exactly as they would apply to whole numbers - you will get the correct answer!Estimation may be useful to check your answer if you are poor at addition or subtraction of integers. But, if that is the case, your estimate is equally likely to be wrong!
What is a Real life situation using LCM?
Adding or subtracting fractions requires the use of a common multiple. It is rare that the LEAST common multiple is required - it is useful to keep the numbers small and manageable.
What statement describes why scientific notation is useful?
It makes calculations with very large and small numbers easier by allowing the 10-factors to be multiplied or divided by adding or subtracting their indices. (The principle of logarithms.)
What is the sum of all positive integers and how is this idea useful?
The sum of all positive integers in infinite. I am not sure how this particular idea is useful.
What is a quick common denominator?
When you're adding or subtracting fractions with different denominators, if you multiply the denominators that's your Quick Common Denominator. I'ts useful for denominators that don't have a low Least Common Factor.
