A one-page printable worksheet with progressively harder tasks: number bonds to 20, missing number sentences (4 + ? = 10), two-digit addition with regrouping (Y2), and a word-problem section. Includes a teacher-marker key.
A 12-question quiz mixing Year 1 and Year 2 difficulty, including bond recall, missing-number reasoning, regrouping and word problems. Tracks best-of-N personal best.
Number Detective Activity Book is a five-mission Years 1–2 maths activity book mapped to the DfE National Curriculum for addition and subtraction. Children secure number bonds to 10 and 20, add and subtract one- and two-digit numbers, solve missing-number sentences, and tackle one-step word problems. Every question is auto-marked on screen, or the whole book can be printed with a full answer key. Includes teacher, parent and pupil notes and is fully SEND-friendly with high-contrast and large-text modes.
The schoolbook-depth Main test. Eighteen questions across the full breadth of the KS1 addition and subtraction programme of study: reading number sentences, fact families, number bonds to 10 and 20, two-digit calculations, missing-number problems (e.g. 8 + □ = 14), commutativity, and one-step word problems.
Designed to mirror what children meet in school-issued workbooks. Pass mark is 70%. Detailed explanations on every question — wrong answers teach.
The stretch test for confident children. Fifteen questions that push beyond schoolbook level: two-step word problems, bridging through 10 (e.g. 8 + 5 = 8 + 2 + 3), finding missing numbers in the middle of a sentence, applying addition and subtraction across measures (money, mass, length), and reasoning about what makes a calculation easier.
Pass mark is 60% — this test is harder than the Main test on purpose. Don’t worry about lower scores; this is where deep understanding shows.
