1. Objective The student will be able to:
add and subtract rational numbers.
compare and order rational numbers.
SOL: none
Designed by Skip Tyler, Varina High School

2. Line up the decimals and add (same signs). -2.564
Find the sum. 1) (-0.26)
Line up the decimals and add (same signs).
-2.564 2)
Get a common denominator and subtract.

3. Find the difference. 3) Change subtraction to adding the opposite.
Get a common denominator.
Subtract and keep sign of the larger number.

4. Find the difference. 4) Change subtraction to adding the opposite.
Get a common denominator and subtract.

5. 5) Solve 6.32 – y if y = -3.42
Substitute for y: (-3.42)
9.74

6. Find the solution 6.5 – 9.3 = ?
-3.2
-2.8
2.8
3.2
Answer Now

7. Find the solution .
Answer Now

8. A rational number is a number
that can be written as a fraction.
How can these be written as a fraction?
3 =

9. Inequality Symbols

10. Ordering Rational Numbers
2 ways to order from least to greatest
Get a common denominator
Change the fractions to decimals (numerator  demoninator)

11. Which rational number is bigger?
1) Get a common denominator.
2) or convert the fraction to a decimal.
< 4 1
< 3 8

12. Which rational number is bigger?7 4 or 1 6
Get a common denominator
or convert to a decimal
1.75 < 1.83 42 24
< 44

13. Which symbol makes this true?5 7 __ 3 4
<
> =
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14. Which symbol makes this true?-2 -1 __ 9 4
<
> =
Answer Now