RECAP: Multiplying and Dividing Rational Numbers

Decimal Division Setup

When dividing 4.875 ÷ 0.025, what is the first step?

• Multiply both numbers by 10

• Move the decimal in the divisor to make it a whole number

• Drop the decimal in both numbers

• Add zeros to both numbers

Tags

CCSS.5.NBT.B.7

Fix the Setup (Decimal Division)

Reorder the steps into the correct order for dividing decimals:

• Move the decimal in the dividend the same number of places

• Divide normally

• Move the decimal in the divisor until it becomes a whole number

• Bring the decimal straight up into the quotient

Tags

CCSS.6.NS.B.3

Decimal Multiplication Setup

When multiplying decimals, you ignore the decimal points until AFTER you multiply.

• True

• False

Tags

CCSS.6.NS.B.3

Decimal Multiplication Placement

When multiplying 3.24 × 0.506, after multiplying like whole numbers, you must count the total number of (a)   places in both factors.

Tags

CCSS.5.NBT.B.7

Fraction Multiplication Setup

To multiply mixed numbers, what must you do first?

• Add them together

• Convert them to improper fractions

• Flip the fractions

• Subtract the whole numbers

Tags

CCSS.5.NF.B.6

Choose the Correct Fraction Division Process

To divide ⅜ ÷ 1⅔, what is the correct setup?

​ ​

• Convert both to improper fractions, then use the zig-zag/KFC method

• Convert both to improper fractions, then subtract

• Keep as mixed numbers and divide directly

• Flip the first fraction and multiply

Tags

CCSS.6.NS.A.1

What is the first step in changing a mixed number to an improper fraction?

• Add the numerator and denominator
• Add the whole number to the numerator
• Multiply the numerator and denominator
• Multiply the whole number and the denominator

When converting the mixed number, after you multiply the whole number by the denominator, you___ the product and the old numerator together to become a new numerator of the improper fraction.

• add

• subtract

• multiply

• divide

Mixed Number Conversion

Which shows the correct conversion of 2 ¾ to an improper fraction?

• 7/4

• 5/3

• 9/4

• 11/4