Understand Distances Between Numbers on a Number Line: CCSS.Math.Content.7.NS.A.1b - Common Core: 7th Grade Math
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Evaluate:
Evaluate:
The sum of two numbers of unlike sign is the difference of their absolute values, with the sign of the "dominant" number (the positive number here) affixed:
Subtract vertically by aligning the decimal points, making sure you append the 3.2 with a placeholder zero:
This is the correct choice.
The sum of two numbers of unlike sign is the difference of their absolute values, with the sign of the "dominant" number (the positive number here) affixed:
Subtract vertically by aligning the decimal points, making sure you append the 3.2 with a placeholder zero:
This is the correct choice.
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is equal to which of the following?
This is a straightforward problem. Remember that when adding a negative number, you are actually subtracting:
Be sure to remember that the first number is also negative, meaning we are subtracting a number from a negative number:
The answer is -6.25.
This is a straightforward problem. Remember that when adding a negative number, you are actually subtracting:
Be sure to remember that the first number is also negative, meaning we are subtracting a number from a negative number:
The answer is -6.25.
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Add: 
Add:
Simply the signs before solving. A positive sign multiplied with a negative sign will convert the sign to a negative, and a negative multiplied with a negative will convert the sign to a positive.
Simply the signs before solving. A positive sign multiplied with a negative sign will convert the sign to a negative, and a negative multiplied with a negative will convert the sign to a positive.
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Solve:
Solve:
When adding with negative values, the sign turns negative. So now we have 
. Since they have the same sign, we just treat it as an addition problem and add 
and then insert the negative sign in front. The answer is 
.
When adding with negative values, the sign turns negative. So now we have
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Solve:
Solve:
When dealing with negative numbers, let's see which number is greater. 
is greater than 
and is positive so the answer is positive. We treat this as a subtraction problem. 
.
When dealing with negative numbers, let's see which number is greater.
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When we add a negative number, the sign turns negative. Since we are adding two negative numbers, we treat this as an addition problem and add a minus sign in the end. 
.
When we add a negative number, the sign turns negative. Since we are adding two negative numbers, we treat this as an addition problem and add a minus sign in the end.
Compare your answer with the correct one above
When dealing with negative numbers, let's see which number is greater. 
is greater than 
and is negative so the answer is negative. We treat this as a subtraction problem. 
. Because our answer should be negative, the correct answer is 
.
When dealing with negative numbers, let's see which number is greater.
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Solve:
Solve:
Remember that adding a negative number is the same as subtracting that same number if it were positive.
Remember that adding a negative number is the same as subtracting that same number if it were positive.
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Since 
is greater than 
and is positive, our answer is positive. We treat as a subtraction problem. Answer is 
.
Since
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When a plus and minus sign meet, the sign is negative. The difference is 
.
When a plus and minus sign meet, the sign is negative. The difference is
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When a plus and a minus meet, the sign is negative. When adding two negatie numbers, we treat as addition and add the minus sign in the end. Answer is 
.
When a plus and a minus meet, the sign is negative. When adding two negatie numbers, we treat as addition and add the minus sign in the end. Answer is
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When a plus and minus sign meet, we have a minus sign.
Since 
is greater than 
and is negative, our answer is negative.
We treat as a normal subtraction.
Answer is 
.
When a plus and minus sign meet, we have a minus sign.
Since
We treat as a normal subtraction.
Answer is
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When adding two negative numbers, we treat as an addition problem and add the minus sign in the end.
Add the ones digits together: 
Add the tens digits together: 
Combine the ones and tens digit to get final answer.
Answer is 
.
When adding two negative numbers, we treat as an addition problem and add the minus sign in the end.
Add the ones digits together:
Add the tens digits together:
Combine the ones and tens digit to get final answer.
Answer is
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When adding two negative numbers, we treat as an addition problem and add the minus sign in the end.
Another way to look at this problem is to start at negative seven on a number line and move to the left three places.
Answer is 
.
When adding two negative numbers, we treat as an addition problem and add the minus sign in the end.
Another way to look at this problem is to start at negative seven on a number line and move to the left three places.
Answer is
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Solve:
Solve:
Since 
is greater than 
and is positive, our answer is positive. We treat as a normal subtraction. The answer is 
.
Since
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Solve:
Solve:
When adding two negative numbers, we treat as an addition problem and add the minus sign in the end. The answer is 
.
When adding two negative numbers, we treat as an addition problem and add the minus sign in the end. The answer is
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Solve:
Solve:
Since 
is greater than 
and is negative, our answer is negative. We treat as a normal subtraction. Answer is 
.
Since
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Since 
is greater than 
and is positive, our answer is positive. We treat as a normal subtraction.
is the answer.
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Since 
is greater than 
and is negative, our answer is negative. We treat as a normal subtraction.
Answer is 
.
Answer is
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When adding with another negative number, just treat as an addition problem and then add a negative sign in front.
Answer is 
Answer is
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