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Use stragites to develop a formula to find the circumference of a circle.

Examples:

1*3.14=3.14 3*3.14=9.4

Lesson:

To find the circumference of a circle do the dimater multiplied by π. The solution is the circumference of the circle.

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Learning Target

Estimate sums and differences using decimals.

Example:59.44+63.26 34.76-23.87

59.00+63.00=120.00 35.00-24.00=11.00

Lesson

To estamate a sum round the decimals to whole numbers then add the whole numbers. To estamate a difference round the decimals to whole numbers then subtract.

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