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What else can I help you with?
How do you estimate decimal sums and differences?
The basic idea is the same as when you estimate sums and differences of larger numbers (which may or may not be integers). You round the numbers to one or two decimal digits, then add them up.
How can you find the sums of decimal amounts in dollars and cents?
Put the numbers in a column with the decimal points aligned. Add the numbers ignoring the decimal points. Insert the decimal point in the answer exactly below the column of decimal points in the numbers being added (summands).
What decimal sums up to 14.1?
13.9 and 0.2 is one possible answer.0.1, 0.1, 0.1 ...141 times is another.
What adds up to 0.55 in decimal notation?
There are infinitely many possible answers:0.27 + 0.28, 0.26 + 0.29, 0.25 + 0.3, and so on0.18 + 0.18 + 0.19, 0.18 + 0.17 + 0.20, 0.18 + 0.16 + 0.21, etcand then there are sums of four numbers, five numbers, six numbers, etc.Next0.275 + 0.275, 0.2749 + 0.2751, 0.27499 + 0.27501, and similar sums to 6 decimal places, 7 decimal places, and so on.
How many ways can you write the value of 8964?
Infinitely many. 0 + 8964 1 + 8963 2 + 8962 and so on. Then consider numbers to 1 decimal place 0.1 + 8963.9 0.2 + 8963.8 and so on. Numbers to 2 decimal places, 3 dp, and so on, all the way to infinitely many decimal places. These are the sums of two numbers. You can have sums of 3, 4, 5, ... numbers. Then there are products, exponents, and many other functions.
How many sums equal 23?
Infinitely many. 12+11, 13+10, 14+9, ... , 22+1, 23+0, 24+(-1), 25+(-2), ... and then you have sums with numbers to one decimal place (dp) such as 11.6+11.4, and so on. Not forgetting numbers to 2 dp, 3, dp, 4, dp, ... , infinitely many dp. But these are only sums of two numbers. There are sums of 3 numbers, 4 numbers, ... infinitely many.
How do you do sums?
The answer will depend on what kind of sums.
What are decimal places in money?
There are usually 100 minor currency units in each major unit and so there are two decimal places.However, for currency exchange rates, where conversions in both direction are required and because very large sums of money are involved, it is common to see 4 or 5 decimal places being used.
How can you use inverse operations to check your answer to a decimal subtraction problem?
If you calculated x - y = z then calculate z + y. If the answer is x your calculation is fine. If not, one of the sums went wrong.
What are all the sums that make 24?
all the sums are 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,and 24
Emily worked out all the sums in her head?
Emily worked out all the sums mentally.
How is the mean calculated?
Add all the sums, then divide by the number of sums. (ie. the average.)
