🎨 Subtraction to 20 Colour by Number

About Subtraction to 20 Colour by Number

Subtraction within twenty is the fluency everything after it rests on, and it takes more repetitions than most children will tolerate from a plain list of sums. Colouring buys those repetitions. Every cell on this grid holds a subtraction whose starting number genuinely reaches into the teens and twenties — not the small numbers that make a page look like subtraction while only ever practising the first ten facts — and the answer is looked up in the colour key at the top. Thirty cells per page, and the answers occupy a window of six consecutive numbers so the key stays short enough to scan. That window slides upward level by level, which raises the numbers being subtracted without ever lengthening the key or changing the shape of the page. Every colour is guaranteed to be used, so no legend entry sits idle. Each level prints as a clean A4 sheet in black and white on any home or school printer, and downloads with its own separate answer key giving the value and colour of every cell. No colour-by-number subtraction game exists in the catalogue; this is a fluency extension rather than a game twin.

Common questions

Do the numbers really reach 20?

Yes. The starting numbers reach into the teens and twenties rather than staying among the first ten facts.

Why is the colour key only six long?

So a young child can scan it without losing their place. The six answers slide upward as the levels progress.

How many cells are on a page?

Thirty, in a five by six grid with the key at the top.

Does every colour get used?

Yes. Every entry in the key appears on the page.