We can estimate answers to complicated additions by rounding both decimals to the nearest whole numbers before adding them together.

**Example:**

64.51 + 18.15 can be estimated by working out 65 + 18

= 83

In this worksheet, students estimate additions by rounding both decimals to the nearest whole numbers before adding them.

**Key stage:** KS 2

**Curriculum topic:**
Number: Fractions, Decimals and Percentages

**Curriculum subtopic:**
Solve Rounding Problems

**Difficulty level:**

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