Acorn Mystery Picture: All four operations to 20
Solve 81 problems (All four operations to 20, numbers 1–20) and color the matching squares to reveal the Acorn. The worksheet and answer key download together.
- equations
- 81
- Largest number
- 20
- Size
- M
An acorn with a textured brown cap, a short stem and a smooth orange nut ending in a little point. The cap shows up first, so children can guess the picture before they finish.
Addition and subtraction to 20, crossing ten included (7 + 8, 16 − 9), are mixed with multiplication and division facts from the times tables whose numbers stay within 20: 3 × 6, 4 × 5, 18 ÷ 3, 20 ÷ 4. Switching between operations is a skill of its own. Plenty of children can manage a full page of subtraction or a full page of multiplication but slip when 12 − 4 is followed straight away by 12 ÷ 4.
Mixed Operations Within 20: Math Mystery PicturesAcorn Math Mystery Picture Worksheet