End of Topic Test - Rounding & Estimation

Test yourself on End of Topic Test - Rounding & Estimation

• What is 0.001934 to 2 significant figures?

• What is 6893134 to 4 significant figures?

• You are trying to do £0.99 x £1.98 in your head. If you estimate and do £1.00 x £2.00, will this be an underestimate or an overestimate?

• Sarah withdraws notes from an ATM in order to buy 4 train tickets at a price of £6.97 per ticket.
  How much money in notes did she withdraw?

• How do you find the upper bound of a subtraction x − y?