Inverse Operations

1
Inverse Operations
Undo Multiplication Equation must remain balanced
2
Inverse Operations
Undo Division Equation must remain balanced
3
Inverse Operations

• Undo Multiplication
• Equations must remain balanced

4
Multiplying Decimals

• When you multiply decimals, you
• 1. Adjust the numbers to the right
• 2. Multiply as usual
• 3. Count the total number of decimal places to
  put the decimal point in the answer

5
Sample 3.2 x 1.12
1.12 x 3.2 224 3360 3 584
Right adjust
Multiply as usual
Count spaces
6
Dividing Decimals

• When you divide decimals you
• 1. Move the decimal point in the divisor to the
  right
• 2. Move the decimal point in the dividend the
  same number of places
• 3. Bring the decimal point straight up
• 4. Divide

7
Move it the same number of spaces in the dividend
Move decimal to the right
8
(No Transcript)
9
Inverse Operations

• Undo Multiplication
• Equations must remain balanced

10
Inverse Operations

• Undo division
• Equations must remain balanced

11
Inverse Operations

• Undo division
• Equations must remain balanced