Units of length metres and centimetres

Transcription

1 Units of length etres and entietres We use etres, entietres and illietres regularly in everyday life. There are 00 entietres in etre. Another way to think about this relationship is that entietre is one hundredth of a etre. 00 = = 00 or 0.0 So = 0 = Convert eah etre easureent into entietres: a = d 9 = b = e = = f = Convert eah entietre easureent to etres: a 0 = d 0 = b 0 = e 7 = 90 = f 80 = Estiate and easure three things that fit in eah ategory: a About etre b About etre Estiate in Measure in About etre Math these objets to their orret easureent by onneting the with a line: 7 8 Length, Perieter and Area E

2 Units of length etres and entietres Measure the length of the lines below using a ruler. Write eah length in entietres, to the nearest entietre. a b 6 Answer these questions about the lines above: a How uh longer is line b than line? b What would the length of line b be if it was shorter? What would the length of line be if it was 9 longer? 7 Draw lines for the following easureents. Make sure you start eah line on the dot. a b 8 8 Work with a partner to easure the following parts of your body with a tape easure. Label your easureents to the nearest entietre in the boxes. a Aross your b Around your head. shoulders. Around one ankle. d Around one wrist. e Fro your foot to the top of your thigh. f Around one knee. g Fro the top of your forehead to your hin. E Length, Perieter and Area

3 Units of length length and deial notation When we easure things that are in etres and entietres it is useful to reord suh lengths in deial notation. Reeber that = 00. This an be written as 0.0. So if we easure soething that is etre and 6 entietres long, we would write it like this:.6 Hundredths of a etre Tenths of a etre Metres in whole nubers Write the easureents in deial for: a etre 69 entietres = b etres 9 entietres = etres entietres = e 9 etres entietres = d entietres = f etres 9 entietres = Write these entietres as etres using deial notation: a 6 = b 9 = 67 = d 607 = e 0 = f = Write these easureents as entietres: a 9. = b. = 6.07 = d.7 = e 0.9 = f 9. = Draw lines for the following easureents. Make sure you start eah line on the dot and keep eah line parallel to the top of the page. a 0.07 b Length, Perieter and Area E

4 Units of length length and deial notation Charlotte thinks that how far you an jup depends on your height. Do you think she is right? Work in a group of four to oplete this table. You will need a tape easure and a spae to do long jup. First easure eah person s height and reord it under their nae in deial notation. Then eah person jups as far as they an. Measure this distane and reord it under their height in deial notation. Nae Height Long jup a Order the naes in your group fro tallest to shortest: b Order the long jups fro longest to shortest by writing the naes: Do you agree with Charlotte? Why or why not? 6 Find the lines that onnet to ake these lengths:, and. Show you have found the by traing over lines that onnet in different olours. To start you off, the first length has been done for you. a = b = = You an use a alulator E Length, Perieter and Area

5 Units of length illietres We use etres, entietres and illietres regularly in everyday life. You should learn these illietre fats: entietre = 0 illietres = 0 = = Estiate and easure these objets in illietres: Objet Estiate Millietres a b Width of your thub Length of your hand Length of a grape Convert these entietre easureents into illietres: a = b = 0 = d 6 = e 7 = f = Write these as entietres and illietres: a 7 = = b 9 = d 6 = Write these easureents as entietres: a = b 6 = 6 = d 8 = Length, Perieter and Area E

6 Units of length illietres Follow these steps to easure these lines aurately in entietres and illietres = Line up the zero on your ruler with the start of the line. Read the last that is at the end of the line. Write down the nuber. Count the after the and write it next to the. a = b = = d = 6 Coplete the table for these deadly spiders: Length in Length in and Length in a Redbak 0.7 b Funnel web and Blak widow d Brown reluse. e List these deadly spiders in order fro sallest to largest: 6 E Length, Perieter and Area

7 Convert it apply Getting ready This is a gae for two players. Players need a ounter eah, a opy of this page and a die. opy What to do The objet of this gae is to get to the finish line first. Deide who will go first. That player rolls the die and oves that any spaes on the board. If you land on a easureent that is white, you ust onvert to OR to. If you land on a easureent that is grey, you ust either onvert to OR to. The other players deide if you are orret. If you are, then you ove forward spae. If you are inorret, you ove bakwards spaes Finish Start Length, Perieter and Area E 7