Grade 4 Decimals: Mixed Operations

Worked examples

Real problems from the practice worksheets, solved one step at a time.

1. Example 1

   45.9 − 29.23 = ?

   1. Line up the decimal points of 45.9 and 29.23.
   2. Subtract each column from right to left, regrouping from the next column when needed.
   3. Bring the decimal point straight down into the answer.
   4. 45.9 − 29.23 = 16.67

   Answer: 16.67

2. Example 2

   52.9 + 25.71 = ?

   1. Line up the decimal points of 52.9 and 25.71.
   2. Add each column from right to left, regrouping when a column reaches 10.
   3. Bring the decimal point straight down into the answer.
   4. 52.9 + 25.71 = 78.61

   Answer: 78.61

3. Example 3

   30.3 − 13.39 = ?

   1. Line up the decimal points of 30.3 and 13.39.
   2. Subtract each column from right to left, regrouping from the next column when needed.
   3. Bring the decimal point straight down into the answer.
   4. 30.3 − 13.39 = 16.91

   Answer: 16.91