A short knowledge check for Year 1 maths on adding and subtracting within 20. Pupils answer quick sums within 10, then to 20 including adding zero, and finish by marking number sentences like 19 - 3 = 15 true or false. An answer key is included. It matches England National Curriculum objectives for Key Stage 1 addition and subtraction.
Number — addition and subtraction
“Add and subtract one-digit and two-digit numbers to 20, including zero”
Sections 1 and 2 cover the full range, with zero handled explicitly.
Number — addition and subtraction
“Read, write and interpret mathematical statements involving addition (+), subtraction (-) and equals (=) signs”
The true or false section tests reading of the equals sign.
Quick sums such as 5 + 3 and 8 - 4.
Sums to 20 with a focus on adding zero, like 15 + 0.
Pupils judge number sentences such as 14 + 2 = 16.
Answers for all three sections.
Assessment check
Run it cold at the end of the unit to see who calculates within 20 without support.
Lesson starter
The within-10 section makes a two-minute warm-up.
Intervention
Use the true or false questions to surface misconceptions about the equals sign.
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