Adding and Subtracting 17,18,19

Pupils use their Enrich school orienteering maps to locate specific control points. At each one, they record the 3rd and 4th numbers from the control marker. They combine the two numbers to make a two-digit number and then add and subtract either 17,18 or 19 from this number.

Key facts

• Maths
• Key Stage 1
• Key Stage 2
• Addition
• Number
• Subtraction
• Orienteering Control Markers Required
• Orienteering Map Required

Arrays

At each control point, pupils record the four numbers from the control marker on their Activity Sheet. They then choose two of the numbers and show them as an array on their activity sheet.

Key facts

• Maths
• Key Stage 1
• Number
• Activity Sheet Download Required
• Orienteering Control Markers Required
• Orienteering Map Required