Numbers EXERCISES
Algebra
1. Here is an equation. If x = 4, what is the value of y?
2. Halima writes an equation on the board and finds the value of t. Her answer is 3. Is she correct?
3. What is the value of x?
4. What is the value of y?
5. Jasmine has a formula for calculating a price for doing people’s nails. It is £1n + £0.50d, where n is the number of nails painted and d is the number of special designs required. Work out the cost for painting 10 nails and 4 nail designs.
6. Astrid buys 3 ice lollies and one ice cream for herself and her friends for a total of £4.50. If the ice cream cost £1.50, how much did each lolly cost?
7. Junior and Ricardo are brothers. This formula, r + 3 = j, can be used to calculate Junior's age (represented by j) compared to Ricardo's age (r). When Ricardo is 12, how old will Junior be?
8. Tim wants to set a rate for his gardening services of £10 per hour with a £5 discount per job. If h is the number of hours he works, how should he write a formula to calculate how much to charge each job?
9. What is a possible combination of values for t and v?
10. Calculate the value of a and b.
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