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Time!

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**What are some units of time that you know?**

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1 minute = __________ seconds 12 minutes = __________ seconds What operation would you use to change a larger unit to a smaller unit?________ What would you multiply 12 by to find the number of seconds in 12 minutes? __________ How many seconds are in 12 minutes? _________

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**Line Plots Review from Third Grade**

NUMBER OF ANIMALS PER HOUSEHOLD What do you remember about line plots? A line plot displays data above a __________ ___________. Each mark above the number line represents ___________________________. Line plots make it (easy or hard?) to see if data falls into groups or clusters.

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**Calculating Elapsed Time**

Record what you know: Start time: _____________ Elapsed time: _____________ End time: _______________

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**SOMETIMES you can subtract!**

How much time has elapsed from 1:20 to 3:45? 3:45 - 1:15

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**Sometimes you need to “borrow” 60 minutes, then subtract!**

How much time has elapsed from 2:45pm to 4:20pm? 4:20 3:80 - 2:45 - 2:45

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**SOMETIMES when the time has elapsed from AM to PM, or PM to AM, you must solve in two parts.**

How long are we in school from 9:00 am to 1:35pm? From 9:00 am to 12:00 pm (noon): 3 hours From 12:00 pm (noon) to 1:35 pm: + 1 hour 35 min

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HOMEWORK: Page 117 all 118 odd

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Solving measurement and time problems. Measurement Problems A farmer buys 2.5 km of wire for fencing. He uses 850m in one field... …and 1.25km in another.

Solving measurement and time problems. Measurement Problems A farmer buys 2.5 km of wire for fencing. He uses 850m in one field... …and 1.25km in another.

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