Place value is used to organize numbers and understand relationships between quantities. It helps organize math problems by assigning value to each digit based on its position. Without place value, it would be difficult to determine the meaning of numbers like 1,865. Integers do not include fractions and are numbers on the number line. Basic rules for adding and subtracting integers include having the same sign result in a positive and different signs a negative, while subtracting a smaller negative number results in a larger positive number.
1. Study Guide
By Matthew
Using place value to organize the counting, ordering and interpretation of number
helps us to understand relationships between quantities.
2. Place Value
• Place value is used to organize math
problems.
• We also use place value to organize
numbers and it’s value.
• Place value is a key thing in math
• With out place value you wouldn’t
know if 1,865 this is one thousand and
sixty five or one hundred eight
thousand and six fifty.
3. Integers
• An integer can not be a half it has to
be a full number.
• Number lines help you add and
subtract integers.
• Integers are numbers like
1,2,3,4,5,6...10000.
• Pos+Pos=Pos
• Pos-Pos=Pos or Neg
4. Adding and Subtracting
negative numbers
A Trick to add or subtract
• Neg+Pos=Neg or Pos negatives is to look at the
• Neg+Pos=Neg or Pos minus or plus sigh
• Neg-Neg=Neg or Pos
-4+-7=?
Look at the add sign and
• Neg-Pos=Neg
the negative seven sign if
• Pos-Neg=Pos they are different you
subtract. -4+-7= or -4-7=-11
if you are subtracting
negative numbers you go
lower like -147 is less than -1.
-147 may look big but it is
further past zero than -1
5. Key Words
• Counting: counting numbers like 1234
etc.
• Organize: Organizing numbers
according to it’s value as a number
• Ordering: Placing numbers in order
from least to most.