Build and record 12+3, 17−2 and 7+0. Keep every starting number and answer within twenty.
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Adult notes · prerequisites, safety and coverage
Prerequisite: bonds to ten. Practise one-/two-digit calculations within 20 with objects; use the related subtraction facts too.
Use large counters, blocks and paper before symbols. Revisit a lesson until the child can show and explain the idea. Numbers grow from 0–10 to 20, then 100; these pages are not a one-sitting course.
Build number bonds and related subtraction facts within twenty.