Brain Warm-UpBrain Warm-Up

Solve: Solve: • 74 – (9+6) x 374 – (9+6) x 3

• The product of 24 and w if w = 8The product of 24 and w if w = 8

• 12.08 + 6.4512.08 + 6.45

• 84.5 – 1.6284.5 – 1.62

MultiplyingMultiplyingDecimalsDecimals

November 9, 2011November 9, 2011

Ms. LatimerMs. Latimer

Steps: Steps:

To multiply decimals, place the longer To multiply decimals, place the longer number on top and multiply as usual. number on top and multiply as usual. Then Then count up the number of decimal count up the number of decimal places in both of the factorsplaces in both of the factors. . Place Place the decimal in your answerthe decimal in your answer so that it so that it has the has the same numbersame number of decimal of decimal places.places.

4.4.291291 x 3. x 3.55 = 15. = 15.01850185 33 places places 11 place place 44 places places

Where’s it go???Where’s it go???

Examples: Let’s work on placing the Examples: Let’s work on placing the decimal point correctly…decimal point correctly…

1.) 78.26 x 12 = 939121.) 78.26 x 12 = 93912

2.) 3.9612 x 2.3 = 9110762.) 3.9612 x 2.3 = 911076

3.) 5.91 x 9.4 = 555543.) 5.91 x 9.4 = 55554

4.) 10.631 x 5 = 531554.) 10.631 x 5 = 53155

5.) 8.93013 x 0.82341 = 735315834335.) 8.93013 x 0.82341 = 73531583433

Skill Practice – Find the productSkill Practice – Find the product

1.) 8.1 x 4.2 1.) 8.1 x 4.2 2.) 0.263 • 5.82.) 0.263 • 5.8

3.) 79.2 x 63.) 79.2 x 6 4.) 1.3 • 0.0074.) 1.3 • 0.007

Do a little, Try a littleDo a little, Try a little

WS (Individually)WS (Individually)– Turning IN! Turning IN!

Out, OUt, OUT! (Out, OUt, OUT! ())

Agendas: Agendas: – PB pg 43 # 1-3, 7, 12, 15, 16, 18PB pg 43 # 1-3, 7, 12, 15, 16, 18

Thumbs Up/Down? Thumbs Up/Down?