**Part 1**

By rounding the following numbers to one significant figure, work out an approximation for the following calculations.

1) 34 x 46

2) 98.5 ÷ 19

3) 323 x 94.2

4) 361.23 ÷ 44.9293

5) 7,923.241 ÷ 249.27

**Part 2**

1) I am holding a concert. I sell 247 tickets for £12.70 each. By rounding each of the numbers to one significant figure, find an estimate for the amount of money that I have gained from selling tickets. Is your answer an over or under estimate?

2) I am raising money for charity. I receive 32 donations and the average for each donation is £5.32. By rounding each of the numbers to one significant figure, find an estimate for the amount of money that was donated. Is your estimate an over or under estimate?

3) I work in a burger van. I sell each burger for £2.90 and over the course of a day, I sell 368 burgers. By rounding each of the numbers to one significant figure, find an estimate for my total sales from burgers. Is your estimate an over or under estimate?

4) The area of a rectangular rug is 643 square cm. One side of the rug is 18.6 cm. By rounding all of the numbers involved to one significant figure, find an estimate for the length of the other side of the rug. Is your answer an over or under estimate? You may find this question easier by drawing a diagram.

5) I am running a concert. 113 people come to the concert and the total ticket sales form the concert is £256 pounds. By rounding all of the number involved to one significant figure, find an estimate for the cost of each ticket. Is your answer an over or under estimate?

**Part 3**

By rounding each of the numbers to one significant figure, find an estimate for the following calculations.