WARM UPS JANUARY 26, 2012

yrds1125.8$

1

1. Determine the unit rate:

11 yards for $8.25

25.8$11

1

2. Which is the better buy?And how much cheaper is it per

pair of socks?

RATESBETTER BUY

COMPARES TWO UNIT RATES – • WHICH IS CHEAPER? • WHICH ONE WILL GIVE YOU MORE FOR YOUR

MONEY??

• unit rate ÷, • DOUBLING (x2), • TRIPLING(x3) OR • HALF TO COMPARE!!

BETTER BUYCOMPARING UNIT RATES

SHAMPOOWHICH IS THE BETTER BUY?

BOTTLE SIZE (OZ)

PRICE

20 $7.18

15 $4.73

10 $3.58

ORANGESWHICH STORE HAS THE BETTER BUY?

STORE LBS PRICE

KROGER 3 $6.90

ALBERTSONS 7 $14.35

WALMART 10 $21.00

Warm ups 1.27.111. What is the better deal:

5 packages of pens at 2 for $.96 or2 packages of pens at 5 for $2.34?

2. How many minutes and seconds is 8.4 minutes?

WARM UPS JANUARY 27, 2012

3. Which example can you CROSS SIMPLIFY?

8551

53

8551

175

COPY Today’s Notes:

Multiplying Fractions•Cross SIMPLIFY

Equivalent Ratios or Rates• Are PROPORTIONAL• Cross PRODUCTS will always be equal.

8551

53

8551

175

If Cross PRODUCTS are NOT EQUAL then the RATIOS or RATES are NOT PROPORTIONAL

13376

74

Which RATIOS are PROPORTIONAL?

9128

134

3615

135

Which RATIOS are PROPORTIONAL?

13376

74

9128

134

3615

135

Rate, ratio proportion phrases

• # out of #• # in #• # for every #• # in each #• # is to #• # in every #

• At this rate,• At a ratio of..• At a rate of..• Then how many…• Uses a scale of..• Per• represents

UNDERLINE!!!!