Helping GED Students
What is Algebra? Simply put, Algebra uses letters or symbols as place holders for numbers that might change. A repair shop might charge $50 initially plus $35 per hour labor plus parts. Expressed in Algebra: 50 + 35h + p. The 35h means you multiply 35 times the number of hours. When the repair is done you just replace the letters with numbers and solve.
There's an old saying: If the formula doesn't get you, the math will. Your student will have to learn the Order of Operations to be successful. In the problem above, if h=3 and p=45, then:
50 + 35 x 3 + 45 =
50 + 105 + 45 =
155 + 45 =
200 = $200
Notice that you must solve multiplication before addition.
Many GED math problems involve proportions. Let's say you see a sign that says "3 for $5". If you want to buy 6, then it's easy to figure they will cost $10. You solved a proportion problem. Double the quantity is double the cost.
But what if you want to buy 10? Hmmm? Well, you have to figure that 10 is a little more than triple the quantity of 3, so the cost should be a little more than triple the $5. You might want to have at least $20 in your wallet.
Submitted by Bob Burger