Spider Mystery Picture: All four operations to 20
Solve 65 problems (All four operations to 20, numbers 1–20) and color the matching squares to reveal the Spider. The worksheet and answer key download together.
- equations
- 65
- Largest number
- 20
- Size
- M
A friendly purple spider with big eyes and a smile, hanging from a thin thread. Its eight black legs appear one by one, which makes it a fun, not-at-all-scary picture for Halloween.
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 PicturesSpider Math Mystery Picture Worksheet