Name: ___________________________
Date: ______________
Class: ____________
LEVEL 1 Β· SUPPORT
The Number System & Expressions
Standards: 6.NS.A.1 (Dividing Fractions) Β· 6.NS.B.4 (GCF/LCM) Β·
6.EE.A.1β4 (Exponents & Expressions)
Directions: Read the vocabulary box and the worked
examples first. Then complete each problem in the space provided. Use
the hint cues if you get stuck. Show your steps.
Vocabulary Helper
- π Keep-Change-Flip
-
To divide fractions: keep the first, change Γ· to Γ, flip the second.
- β¬οΈ Exponent
-
A small number that tells how many times to multiply. 4Β³ = 4 Γ 4 Γ
4.
- π€ Greatest Common Factor (GCF)
- The biggest number that divides evenly into two numbers.
- π Least Common Multiple (LCM)
- The smallest number that two numbers both divide into.
- π€ Algebraic Expression
-
A math phrase with numbers, letters (variables), and operations,
like 2x + 3.
- π¦ Distributive Property
-
Multiply the outside number by each term inside: a(b + c) = ab + ac.
Worked Examples
EXAMPLE A β Dividing Fractions (Keep-Change-Flip)
Solve: ΒΎ Γ· β
- Keep the first fraction: ΒΎ
- Change Γ· to Γ
- Flip the second fraction: β
becomes 5/2
- Multiply: ΒΎ Γ 5/2 = 15/8 = 1 β
EXAMPLE B β Evaluate an Expression
Evaluate 3xΒ² + 2 when x = 4
- Replace x with 4: 3(4)Β² + 2
- Exponent first: 4Β² = 16 β 3(16) + 2
- Multiply: 3 Γ 16 = 48 β 48 + 2
- Add: 48 + 2 = 50
Sentence Frames
To divide ΒΎ Γ· Β½, I the first fraction,
change Γ· to , and
the second fraction.
The GCF of 12 and 18 is because it is the
largest factor they share.
The expression 4Β³ means 4 multiplied by itself
times, which equals
.
Guided Practice
1. Β½ Γ· ΒΌ = ?
Hint: Keep Β½, change to Γ, flip ΒΌ to 4/1.
2. β
Γ· β
= ?
Hint: Flip β
to 6/1, then multiply.
3. What is 5Β³?
Hint: 5Β³ means 5 Γ 5 Γ 5.
4. What is the GCF of 12 and 18?
Hint: Factors of 12: 1, 2, 3, 4, 6, 12. Factors of 18: 1, 2, 3, 6, 9,
18. Pick the biggest shared one.
5. What is the LCM of 4 and 6?
Hint: Multiples of 4: 4, 8, 12... Multiples of 6: 6, 12... Find the
first shared one.
6. Evaluate 2x + 7 when x = 3.
Hint: Replace x with 3: 2(3) + 7.
7. Simplify: 5x + 3 + 2x
Hint: Combine like terms. 5x and 2x are like terms; 3 stays.
8. Use the distributive property: 4(x + 3)
Hint: Multiply 4 by x, then 4 by 3.
9. β
Γ· β
= ?
Hint: Any number divided by itself equals 1.
10. Evaluate 10 β 2Β³ + 1
Hint: Do the exponent first: 2Β³ = 8. Then left to right.
Answer Key
- 2 β Β½ Γ 4/1 = 4/2 = 2
- 4 β β
Γ 6/1 = 12/3 = 4
- 125 β 5 Γ 5 Γ 5 = 125
- 6 β Both 12 and 18 divide by 6
- 12 β Smallest number in both lists
- 13 β 2(3) + 7 = 6 + 7 = 13
- 7x + 3
- 4x + 12
- 1 β β
Γ 5/3 = 15/15 = 1
- 3 β 2Β³ = 8, then 10 β 8 + 1 = 3