About this game

Find how many are missing

Find how many are missing: a free Pre-K math game for ages 4-5. Each round draws 5 questions; instructions are read aloud and every answer is checked and explained.

How it plays and why it helps

Setting out plates for seven when three are already on the table is a real counting problem. Find how many are missing is the Pre-K version. Each round shows five pictures, such as 3 carrots when we need 7, or 6 butterflies when we need 10. The instruction is read aloud, and your child taps how many are missing among four numbers. Every answer is checked and explained: from 3 to 7, 4 are missing.

Finding the missing part is an early form of subtraction, done by counting up rather than taking away. The hint describes the method: count what you see, then keep counting on your fingers up to the target. The fingers raised during that second count are the answer, always between 1 and 4.

The likely mistake is tapping one of the two numbers your child already knows: the target, 7, or the amount shown, 3. Both are among the choices. Ask, "How many more until we reach seven?" Then count up together, raising a finger each time. Praise the counting up: "You counted on and kept the extra fingers."

Aligned with

  • P-MATH 6 Child understands addition as adding to and understands subtraction as taking away from.

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