Scroll:Add and subtract integers >> Integer addition and subtraction rules >> saq (3971)

Written Instructions:

For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..

For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.

Leave your answers in the simplest form or correct to two decimal places.


 

1)  

 Is 10 + 8 positive or negative




Answer:_______________




2)  

 Is -40 – -19 positive or negative




Answer:_______________




3)  

 Is -21 + 6 positive or negative





Answer:_______________




4)  

 Is 5 – -30 positive or negative




Answer:_______________




5)  

 Is -3 + -73 positive or negative




Answer:_______________




6)  

 Is 7 + 12 positive or negative




Answer:_______________




7)  

 Is -49 – -6 positive or negative




Answer:_______________




8)  

 Is -22 + 13 positive or negative





Answer:_______________




9)  

 Is 5 – -30 positive or negative




Answer:_______________




10)  

 Is -3 + -73 positive or negative




Answer:_______________




 

1)  

 Is 10 + 8 positive or negative



Answer: 2


SOLUTION 1 :

Remember:

When you add positive numbers, the result is positive.

Solve:

When you add two positive numbers, like 10 and 8, the result is positive.

You can check your answer by doing the maths.

10 + 8 = 18


As you can see, the result is positive.



2)  

 Is -40 – -19 positive or negative



Answer: 1


SOLUTION 1 :

Remember:

Instead of subtracting a number, you can add its opposite.

When you add a positive number and a negative number:If the positive number has a bigger magnitude, the result is positive.If the negative number has a bigger magnitude, the result is negative.

Solve:

Since you are subtracting a negative number, add a positive number instead:

-40 – -19 = -40 + 19


Now you have a negative number, -40, and a positive number, 19. The result has the same sign as the number with the larger magnitude.

The magnitude of -40 is 40.

The magnitude of 19 is 19.


Since -19 has a larger magnitude and -40 is negative, the result is negative.

You can check your answer by doing the maths.

-40 – -19 = -21


As you can see, the result is negative.



3)  

 Is -21 + 6 positive or negative



Answer: 1



SOLUTION 1 :

Remember:

When you add a positive number and a negative number:If the positive number has a bigger magnitude, the result is positive.If the negative number has a bigger magnitude, the result is negative.

Solve:

When you add a negative number, -21, and a positive number, 6, the result has the same sign as the number with the larger magnitude.

The magnitude of -21 is 21.

The magnitude of 6 is 6.


Since -21 has a larger magnitude and -21 is negative, the result is negative.

You can check your answer by doing the maths.

-21 + 6 = -15


As you can see, the result is negative.



4)  

 Is 5 – -30 positive or negative



Answer: 2


SOLUTION 1 :

Remember:

Instead of subtracting a number, you can add its opposite.

Solve:

Since you are subtracting a negative number, add a positive number instead:

1 – -20 = 1 + 20


Now you have the sum of two positive numbers. When you add two positive numbers, the result is positive.

You can check your answer by doing the maths.

1 – -20 = 21


As you can see, the result is positive.



5)  

 Is -3 + -73 positive or negative



Answer: 1


SOLUTION 1 :

Remember:

When you add negative numbers, the result is negative.

Solve:

When you add two negative numbers, like -8 and -72, the result is negative.

You can check your answer by doing the maths.

-8 + - 72 = - 80


As you can see, the result is negative.



6)  

 Is 7 + 12 positive or negative



Answer: 1


SOLUTION 1 :

Remember:

When you add positive numbers, the result is positive.

Solve:

When you add two positive numbers, like 7 and 12, the result is positive.

You can check your answer by doing the maths.

7 + 12 = 19


As you can see, the result is positive.



7)  

 Is -49 – -6 positive or negative



Answer: 1


SOLUTION 1 :

Remember:

Instead of subtracting a number, you can add its opposite.

When you add a positive number and a negative number:If the positive number has a bigger magnitude, the result is positive.If the negative number has a bigger magnitude, the result is negative.

Solve:

Since you are subtracting a negative number, add a positive number instead:

-49 – -6 = -49 + 6


Now you have a negative number, -49, and a positive number, 6. The result has the same sign as the number with the larger magnitude.

The magnitude of -49 is 49.

The magnitude of 6 is 6.


Since -6 has a larger magnitude and -49 is negative, the result is negative.

You can check your answer by doing the maths.

-49 – -6 = -43


As you can see, the result is negative.



8)  

 Is -22 + 13 positive or negative



Answer: 1



SOLUTION 1 :

Remember:

When you add a positive number and a negative number:If the positive number has a bigger magnitude, the result is positive.If the negative number has a bigger magnitude, the result is negative.

Solve:

When you add a negative number, -22, and a positive number, 13, the result has the same sign as the number with the larger magnitude.

The magnitude of -22 is 22.

The magnitude of 13 is 13.


Since -22 has a larger magnitude and -22 is negative, the result is negative.

You can check your answer by doing the maths.

-22 + 13 = -9


As you can see, the result is negative.



9)  

 Is 5 – -30 positive or negative



Answer: 1


SOLUTION 1 :

Remember:

Instead of subtracting a number, you can add its opposite.

Solve:

Since you are subtracting a negative number, add a positive number instead:

9 – -50 = 9 + 50


Now you have the sum of two positive numbers. When you add two positive numbers, the result is positive.

You can check your answer by doing the maths.

9 – -50 = 59


As you can see, the result is positive.



10)  

 Is -3 + -73 positive or negative



Answer: 1


SOLUTION 1 :

Remember:

When you add negative numbers, the result is negative.

Solve:

When you add two negative numbers, like -12 and -76, the result is negative.

You can check your answer by doing the maths.

-12 + - 76 = - 88


As you can see, the result is negative.