# Lesson 10 Write Number Riddles

Let’s write and solve number riddles.

## Warm-up True or False: Add within 100

Decide if each statement is true or false.

Be prepared to explain your reasoning.

## Activity 1 Write Number Riddles

Our secret number:

Our **4** clues:

Write each clue on an index card.

Make sure the last clue is an addition expression.

Fold that clue in half.

## Activity 2 Solve Our Number Riddles

Record your ideas as you solve each number riddle.