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By the signs: 2+2(Add) 2-2(Subtract) +=add -=subtract

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Q: How do you know whether you should add or subtract the value of the two numbers?
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Explain why it is important to line up decimal numbers by their place value when you add or subtract them?

explain why it is important to line up decimal numbers by their place value when you add or subtract them

How do you find the value of x when you have three other numbers?

add the three numbers the subtract 180 from your sum

How do you add two numbers with opposite signs?

Subtract the absolute value of the smaller number from the absolute value of the larger number. The answer will have the sign of the larger numbers.

Why it is important to line up decimal numbers by their play value when you add or subtract them?

This is true for adding and subtracting ALL numbers, not just decimal representations.

How should you use the graph to determine the range of the temperature data?

Fnd the lowest value and subtract it from the highest value.

What is the compatible number of 77?

Compatible numbers are numbers that are close in value to the actual numbers and easy to add, subtract, multiply, or divide mentally.So a logical compatible number for 77 would be 80.

How do you subtract three sixteenths from 70 and a half?

Instead of "a half", write "eight sixteenths". That doesn't change the value of any numbers, but it makes it a lot easier to subtract the three sixteenths from the eight sixteenths.

Why do you subtract to find the range?

The range is the distance from the smallest value to the largest value. This is equivalent to the largest value MINUS the smallest value. Therefore you subtract.

How can you determine whether a measured value of a substance represents an extensive property?

Its value will be reduced as the numbers of moles of the materials is reduced

Why is it important to always subtract the earlier value from the later value when finding the change in mass instead of always subtracting the smaller value from the larger one?

If you always subtract the smaller value from the larger one, the number that you tell other people lets them know how much the mass changed, but it doesn't tell them whether the mass increased or decreased as time passed.

What is the difference between the largest and the smallest values in a set of numbers?

This difference is called the range. Subtract the smallest value (S) from the largest value (L).Formula: L - S = Difference

What is the rule for adding integer?

If the integers have the same sign (poitive or negative) you should add them together. If they have a different sign you subtract the numbers and the answer will take the sign of the number with the greatest absolute value (the number farthest from zero on a numberline) in the problem.