1. Addition & Subtraction

Question 1

Define “Borrow”

Answer 1

1. When subtracting numbers, if the number in the top position of a column is smaller than the one below (the one being subtracted), you subtract 1 from the number to the left of the top number, and add 10 to the number from which you are subtracting.
2. Because the number to the left has a place value that is 10 times the number to the right, you are “borrowing” 10 from that number.

Question 2

Define “Carry”

Answer 2

1. When adding numbers, if the answer in a column is more than 1 digit in size, then the digit in the 10’s place of the answer is “carried” to the column to the left to be added.

Question 3

Define “Digit”

Answer 3

1. An individual number from 0 to 9 that can be used to make up a larger number.

Question 4

Define “Place Value”

Answer 4

1. The Value assigned to a digit based on where it is placed within the number

Question 5

Define “Whole Number”

Answer 5

1. Any of the numbers 0, 1, 2, 3, 4, etc. that are not fractions or decimals

Question 6

What is the first step to written subtraction?

Answer 6

1. Write the numbers above each other, lining up the corresponding digits

Question 7

What is the second step to written subtraction?

Answer 7

1. Start subtracting from the right-most column, working over to the left

Question 8

What is the 3rd step to written subtraction?

Answer 8

1. Borrow when necessary

Question 9

What is the first step to written addition?

Answer 9

1. Write the numbers one on top of the other, lining up the digits

Question 10

What is the second step to written addition?

Answer 10

1. Begin to add, starting from the right

Question 11

What is the third step to written addition?

Answer 11

1. Carry when necessary

Question 12

What is the most common mistake in written addition?

Answer 12

1. Writing more than one digit per column in the answer section below the line

Question 13

What is the most common mistake in written subtraction?

Answer 13

1. When borrowing, not decreasing the digit to the left and then not increasing the digit to the right by that same amount

Question 14

What is the 1st key to good written addition and subtraction?

Answer 14

1. Keep the columns lines up and write the answers directly below each column

Question 15

What is the 2nd key to good written addition and subtraction?

Answer 15

1. Estimate what you think the answer will be before solving. It the answer you get varies greatly from that, go back and double check your work

Question 16

521 + 454 =

Question 17

What is another term for Whole Number?

Answer 17

1. Integer