Question: Can Answer Be Incorrect Even If It Looks Reasonable?

Which number is the best estimate for 819 279?

Therefore, the best estimate is 1100..

How did they use decimals in pricing and costing?

The listing of a security’s price in decimals instead of fractions. For example, decimal pricing means that a security would be listed as, say, $25.25, instead of $25 1/4. Decimal pricing makes prices and the market more understandable for investors and laypeople.

How do you know that the answer to a decimal subtraction problem is reasonable How can you check that the answer is correct?

❖ You know the answer to a decimal subtraction problem is reasonable by estimating. You can also add up the subtrahend and the difference to check if your answer is correct.

What are estimation strategies?

Some of the estimation strategies are: Front-End Strategy and Closest-Ten Strategy (or rounding). Estimating sums and differences is valuable because it helps predict an answer and check a calculation. When using estimation in a problem solving context, there are important things to keep in mind.

What are two ways to estimate?

There are different methods for estimation that are useful for different types of problems. The three most useful methods are the rounding, front-end and clustering methods.

What is the estimated sum for 896 325?

896 plus 325 is equal to 1221. Since you are trying to estimate, you can say, around 1200.

What are compatible numbers?

Compatible numbers are pairs of numbers that are easy to add, subtract, multiply, or divide mentally. When using estimation to approximate a calculation, replace actual numbers with compatible numbers.

How is estimation helpful when finding a product mentally?

Estimating keeps you from making a huge mistake. it will make it easier to solve the problem. Also it would be faster because you don’t have to get the exact amount like cooking for groups of people and you don’t know how many people are coming so you estimate.

How can estimating quotients help me to place the decimal correctly?

You will need to multiply and then estimate the solution. Start by multiplying just as if you were multiplying whole numbers. Because the original numbers have 4 digits total after their decimal points, insert a decimal point into your answer so that it has 4 digits to its right.

How can you determine if your answer is reasonable?

A reasonable estimate does not exceed the original numbers in a problem. For instance, in a division problem like 424 ÷ 4 − 10, we can check is our answer is reasonable or not, by estimating an approximate answer or by plugin gin using the division formula.

How do you assess the reasonableness of your answer?

Well, one way to use reasonableness is to estimate the answer to see if your answer is an outrageous answer or not. So, looking at your problem, you see that you are multiplying a 200-something number by 4 and then subtracting 10 from it.

How can you use estimation to help find a solution?

Using estimation can help you check to see if your answer is reasonable. Solve multistep word problems posed with whole numbers and having whole-number answers using the four operations, including problems in which remainders must be interpreted.

What is the difference between rounding and estimation?

Rounding and estimating are math strategies used for approximating a number. To estimate means to make a rough guess or calculation. To round means to simplify a known number by scaling it slightly up or down. Rounding is a type of estimating.

Which expression is best estimate of the product of 7 8 and 8 1 10?

Answer: 7/8 is nearly 1, and 8 1/10 is obviously 8.1 (1/10), which is rounded to 8. So th expression that best estimates the products of those numbers is D, 1 * 8.

Why is it helpful to estimate the answer before adding or subtracting decimals?

Estimation is useful when you don’t need an exact answer. … Estimating with decimals works just the same as estimating with whole numbers. When rounding the values to be added, subtracted, multiplied, or divided, it helps to round to numbers that are easy to work with.

What means reasonable?

Reasonable describes someone or something that’s sensible and fair, like your teacher who gives reasonable homework assignments — they don’t take you forever to do and they relate to what you are studying. If you’re reasonable, you have good sense and judgment.

Which is the best estimate of 162% of 79?

So the estimate of 162% of 79 is 130. Hope this helps!

Just, rational, appropriate, ordinary, or usual in the circumstances. It may refer to care, cause, compensation, doubt (in a criminal trial), and a host of other actions or activities.