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# Subtraction word problem: tennis balls

Sal solves a 2-step subtraction word problem with numbers less than 100.

## Want to join the conversation?

• Can you just add than subtract
• Yes you can add and than subtract. Adding 19 + 6 is the same as grouping all the balls that are no longer with the class into a single number. Then you can subtract that number from 45 and get the number of balls that remain.
• How can I tell if I am adding or subtracting?
• I think of it as money like this guy above me, when you put money in a bank, you are checking in, and when you are pulling money out your are withdrawling or taking a way.

example:
Jill has 100,000,000 dollars in her bank, and she adds 10,000,000, then she takes 5,675,000 away. how much does she have left?

HOPE IT HELPS!
(1 vote)
• Is there a easyer way to math?? Because I'm not very good at math.
• allison.1473: Don't ever say you are not good at math! Math is about so much more then just solving equations, it's about seeing numbers in the world around you. As Bug Sanders said, it will take practice. But as you do more and more math you will find ways to do math that are easier for you. For now, just try to practice a lot, be open to new ideas and techniques, and keep on asking questions!
• For now, the bigger number will always be the number that you subtract the smaller number from. Big - Small = Positive Difference. Later, you'll get introduced to what happens when you subtract a larger number from a smaller number, which leads you to a whole different class of numbers that are less than 0.
• Hi. Can someone help me with a question?
• Sure, I can help you with any questions you have. Whenever you want you can just ask me your question and I will answer it to the best of my ability.
• I have problems when it comes to word problems. Can someone help me with this problem? This is the problem: Your class is holding a fundraiser for a local charity. After the first week, your class raised 1/8 of your goal. After the second week, your class raised a total of 3/5 of your goal. What fraction of the goal was raised during the second week of the fundraiser?
All answers are highly welcome. Thank you^^
• I think I'm too late to answer this but I'll still show you the answer.
First you have to identify the given, which are the goal (1), the first week progress (1/8), and the total goal after the second week (3/5). Since the class finished 1/8 of the goal after the first week, and you know how many did the class raised after the second week (3/5), the equation to find the number is 1/8 + ? = 3/5 or 3/5 - 1/8 = ?. To find the answer, you need to find the LCD, which is 40, so that makes it 24/40 - 5/40 = ?. Subtract the nominators and the answer is 19/40.
• How do you subtract a smaller number to a bigger number?
(1 vote)
• The answer goes less than zero, and goes into the negatives, such as 5-7= -2, because it goes two spots below zero.