Mathsercise-C Estimation Ready? Here we go!. Estimate the value of: 1 Estimation 79.7 2.13 x 7.85 Answer Question 2 Round each number to 1 significant.

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Presentation transcript:

Mathsercise-C Estimation Ready? Here we go!

Estimate the value of: 1 Estimation x 7.85 Answer Question 2 Round each number to 1 significant figure! 80 2 x = 5

Estimate this… 2 Estimation x Answer Question 3 Round each number to 1 significant figure! 10 x = 20 You could round this to 15 and then 15 x 20 = 300, and this would be ok

3 The length of a newly born is 56cm (to the nearest cm) Estimation a) What is the longest length it could have been? b) What is the shortest length it could have been? Answer Question 4 Always go half up or down from the rounding, so.. Half a cm up will be 56.5cm Half a cm down will be 55.5cm

The weight of a car is 843kg (to the nearest kg) 4 a) What is the heaviest the car could be? b) What is the lightest the car could be? Estimation Answer Start Always go half up or down from the rounding, so.. Half a kg up will be 843.5kg Half a kg down will be 842.5kg