Try to answer the following orally and as fast as you can. Ready... get set... go!
- Try to identify the variable(s) in the following expressions:
- a) 7j + 8
- b) 5x - 2
- c) 9a + 3b
- If x represents the number of meters Nick sprinted for gym class, make an expression for:
- a) The distance Nick sprinted, doubled.
- b) Half of the distance Nick sprinted.
- c) The distance Nick sprinted, plus an additional 10 meters.
- If y represents the number of hours Jane spent sleeping, make an expression for:
- a) 5 hours more than the number of hours Jane slept
- b) Twice the time Jane spent sleeping
- c) Twice Jane's time sleeping, plus 5 more hours
- If z represents the number of gun shots James fired, make an expression for:
- a) The number of shots James would have made if she fired 8 more shots.
- b) The number of shots James would have made if she only fired half of the total shots she did.
- c) The number of shots James would have made if she fired 3 less shots.
- If x represents the amount of money (in PHP) Julia spent at the bookstore, make an expression for:
- a) The amount of money she would have spent if she bought one more book worth 280 pesos.
- b) The amount of money she would have spent if she didn't buy the book worth 150 pesos.
- c) The amount of money she would have spent if she had spent twice as much, and bought an additional book on sale for 75 pesos.
Done with the excercise? Still remember your answers? Wanna know how many you got correct? Wanna check if you even managed to get all the questions right?
Read ahead to see the answers!
- The variables:
- j
- x
- a & b
- Nick's sprint
- 2x
- x/2
- x + 10
- Jane's sleeping hours
- y + 5
- 2y
- 2y + 5
- James' gun shots
- z + 8
- z/2
- z - 3
- Julia spending money at the bookstore
- x + 280
- x - 150
- 2x + 75
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