A no-prep 10-pack of math task cards for stations or scoot games covering subtraction within 20 for Grade 2 / Year 3. 400 cards across 10 sets with full answer keys — every answer recomputed and verified by code. Print, hand out, teach. What's included • 10 sets of task cards (Sets A, B, C, D, E, F, G, H, I, J) — same skill, varied numbers, 40 cards each, 4 per page cut-along-dashed-line. • Full answer key for each set on a separate page. • Skill tag and standards label on every problem. • A4 pr