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Complete a practice session to earn a star. Accuracy above 70% earns two stars; above 90% earns three.

About this skill

Fill in the missing number to 100

This skill helps children learning numbers to 100 understand number order and find missing numbers in a hundred chart.

How to practice:

  • Look at the chart of numbers from 1 to 100, arranged in ten rows. One number is missing.
  • Find the missing number and enter it using the keyboard.
  • Tap Help to see the correct answer.

Every number has a place in the sequence. The chart helps children see relationships between numbers instead of treating each number separately.

The questions practice mathematical thinking, attention, memory, and reasoning. Count forwards and backwards, notice patterns, and restore the correct sequence.

These skills support comparison, addition, subtraction, number-line work, and calculations. Children become more confident about which number is greater or smaller and which comes before or after another.