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

Q: How do you know whether you should add or subtract the value of the two numbers?

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

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

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.

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.

As an example, 13579 the number 5 is in the hundreds place and has the value of 500. It does not matter whether the numbers are odd or even.

Related questions

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

add the three numbers the subtract 180 from your sum

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.

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

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

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.

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.

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.

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

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.

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

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.