Unit 1 Review - Rational Number Operation Rules

Match the Rational Number Operation with the correct rule directions.

• Answer is always negative

• Adding Numbers with the same sign

• Answer is always positive

• Subtracting

• Add the numbers, keep the sign

• Multiplying/Dividing the same sign

• Keep Change Change then follow add rules

• Multiplying/Dividing different signs

• subtract, take the sign of the bigger #

• Adding numbers with different signs

When adding or subtracting fractions, I must always have a (a)   . I then add or subtract the ​ (b)   and keep ​ (c)   the same.

• Common Denominator
• Numerators
• Denominator
• Common Numerators
• Divisor
• Dividend

When multiplying fractions, I multiply the ​ (a)   and I multiply the ​ (b)   ​ (c)   .

• numerators
• denominators
• straight across
• cross multiply
• least common multiple
• greatest common factor

When dividing fractions, I ​ ​ (a)   the ​ divided (first fraction) the same, I change ​ (b)   to ​ (c)   ​ , and I ​ (d)   the divisor (second fraction).  Then I ​ (e)   .

• keep
• multiplication
• division
• flip
• multiply normally
• change
• divide normally
• addition

When ​ (a)   decimals, I must always ​ (b)   the decimals.

• adding or subtracting
• line up
• multiplying or dividing
• get rid of

When ​ (a)   decimals, I ​ (b)   the numbers like normal and then ​ (c)   the numbers behind the ​ (d)   in the factors, and move the decimal that amount in the ​ (e)   .

• multiply
• count
• decimals
• answer
• multiplying
• dividing
• divide

When ​ (a)   by a decimal, I must change the ​ (b)   (second or outside number) to a ​ (c)   .  Then I move the decimal the that same amount in the ​ (d)   (first or inside number).  Then ​ (e)   like normal.

• dividing
• whole number
• dividend
• divisor
• divide
• multiplying
• multiply
• fraction

Change the following subtraction problems to addition using Keep - Change - Change, then put them under the correct adding rule you would use to solve the problem.

Groups:

(a) Adding Numbers with the same sign

,

(b) Adding Numbers with different signs

When solving the following expressions, will the answer be POSITIVE, NEGATIVE, or ZERO?

Groups:

(a) Positive Answer

,

(b) Negative Answer

,

(c) Zero