Adding and Subtracting 1 Digit and 2 Digits

-2 + 6 =

• 4

• -4

• 8

• -8

10 - (-5) =

a number that is added to another.

• rational number

• opposite

• inverse

• addend

Find the difference: 12 - 5

Find the difference: 14 - 6

Which of the following is the first step in adding decimals?

• Put the decimal point in the answer.

• Write the numbers vertically.

• Subtract the numbers as usual.

• Add zeroes after the last digit.

What number will be added to 123.7 to get the sum 134.8?

• 11.2

• 12.1

• 13.1

• 11.1

What is the first thing to do when adding or subtracting decimal numbers?

• add the given digits first

• move the decimal point to the left side, then subtract

• move the decimal point to the right side

• line up the decimals first, then fill in with zeros

Which statement is CORRECT about estimating numbers?

• nothing will do to the digit in the rounding place if the digit to its right is lower than 5.

• add 1 to the digit in the rounding place if the digit to its right is higher than 5.

• subtract 1 from the digit in the rounding place if the digit to its right is higher than 4.

• add 1 to the digit in the rounding place if the digit to its right is lower than 5.

The result of adding two or more addends is the

• difference.

• sum.

• digit.

• base.