Grade 4 Decimals: Unit Review

Worked examples

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

1. Example 1

   Ben had $5.00. Ben spent $1.35 on a puzzle. How many dollars does Ben have left?

   1. Start with the first amount and take away what was used, so subtract to find what is left.
   2. Line up the decimal points: 5.00 − 1.35. Think in hundredths: 500 − 135 = 365 hundredths, which is 3.65.
   3. So the answer is $3.65.

   Answer: 3.65

2. Example 2

   Which digit is in the hundredths place of 1.54?

   1. Right after the decimal point come the tenths, then the hundredths, then the thousandths.
   2. In 1.54, the digits after the point are 5, 4. The hundredths digit is the second one.
   3. So the digit in the hundredths place of 1.54 is 4.

   Answer: 4

3. Example 3

   6.7 − 5.6 = ?

   1. Line up the decimal points of 6.7 and 5.6.
   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. 6.7 − 5.6 = 1.1

   Answer: 1.1