Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Subtracting for the answer

Sometimes a clue or key word isn t really apparent in a word problem it may be there and you don t recognize it, or it just may not be there at all. You have to determine which operation or operations are needed without much help. In the case of problems that finally end up using subtraction, you ll find that the situation has to do with finding the difference between two values — how much bigger one is than the other. [Pg.56]

Can you create the numbers 1, 2, 3, 4, and 5 using four 4s and the operations of addition, subtraction, multiplication, and division, only  [Pg.57]

The Problem Ruby is taking a mathematics class where 4 tests, 10 quizzes, and 20 homework assignments determine her grade. She has one test left to take and needs 920 points to get an A in the course. She currently has 847 points, and the test is worth 100 points. How many points does she have to get on the test to get an A Is it possible for her to get an A  [Pg.57]

This problem is an example of a situation where you have to wade through all the information to figure out what s needed to answer the question. The fact that there are 4 tests, 10 quizzes, and 20 homework assignments has nothing to do with the question. Also, there aren t any clue words such as difference or less. To answer the question, Ruby needs to subtract 847 from 920 to see how many points she needs. Then she can compare that answer to the number of points possible. Doing the subtraction, 920 - 847 = 73. It looks like, if Ruby gets 73 percent of the points on the test, she ll get her A. [Pg.57]

Multiplication is really just repeated addition. If you re adding the same number to itself over and over again, then you re really doing multiplication, and the multiplication facts are very helpful. Some of the key or clue words for multiplication are times, multiplied, twice, and thrice. (Okay, so nobody says thrice anymore, but if they did, it would be a clue that multiplication was involved.) [Pg.57]


See other pages where Subtracting for the answer is mentioned: [Pg.56]   


SEARCH



Answers

Subtracter

Subtracting

Subtractive

© 2024 chempedia.info