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5. Calculate how much wire-netting you will need to go right round the hen-run. (You do not need a gate; you can step over.)

6. Challenge: Make a model of your hen-run. You may even make it to scale. Ask your educator to help you. (Use a simple scale, e.g. 1 cm =1 m).

TEST YOUR PROGRESS

1. Complete the following:

  • 6 578 g = ____________kg
  • 5,703 km = ______________ m
  • 6 712 ml = ______________litres
  • 7 68 mm = _______________ m
  • 34 mm = _______________________m (5)

Solve the following sums and write down all the steps of your calculations:

2. 87 mm + 4 568 mm + 1,250 m (answer in metres)

3. An ant runs round the edge of a book that is 15 cm wide and 21,5 cm long. How far does the ant run?

4. Peter drinks 250 ml of water after a tennis match and then the coach gives him 350 ml of orange juice. How much liquid does he drink altogether?

5. The mass of a van is 2 250 kg when it is empty. Sixteen bags of oranges each with a mass of 15 kg are loaded onto the van. What is the mass of the van and its load together? (4)

6. Mother has 5 kg of flour. She uses three and a half kg of it. How much flour is left? (2)

Assessment

LO 4
measurementThe learner will be able to use appropriate measuring units, instruments and formulae in a variety of contexts.
We know this when the learner:
4.1 reads, tells and writes analogue, digital and 24-hour time to at least the nearest minute and second;
4.2 solves problems involving calculation and conversion between appropriate time units including seconds, minutes, hours, days, weeks, months and years;
4.3 uses time-measuring instruments to appropriate levels of precision, including watches and clocks;
4.4 describes and illustrates ways of measuring and representing time in different cultures throughout history;
4.5 estimates, measures, records, compares and orders two-dimensional shapes and three-dimensional objects using S.I. units with appropriate precision for:
  • mass using grams (g) and kilograms (kg);
  • capacity using millilitres (ml) and litres (l);
  • length using millimetres (mm), centimetres (cm), metres (m) and kilometres (km);
4.6 solves problems involving selecting, calculating with and converting between appropriate S.I. units listed above, integrating appropriate context for Technology and Natural Sciences;
4.7 uses appropriate measuring instruments (with understanding of their limitations) to appropriate levels of precision including:
  • bathroom scales, kitchen scales and balances to measure mass;
  • measuring jugs to measure capacity;
  • rulers, metre sticks, tape measures and trundle wheels to measure length;
4.8 investigates and approximates (alone and/or as a member of a group or team):
  • perimeter, using rulers or measuring tapes.

Memorandum

ACTIVITY 1 measuring

  1. Mass

1.1 500 g (or other sizes)

1.2 (a) 500 g; (b) cornflakes; (c) depends on size; (d) 250 g

1.3 (a) own; (b) own (2,5 g); (c) 2,5 g; (d) own

1.4

Object My estimation Actual measured mass
Tea-bag own 2,5 g
Margarine own 500g (or other)
Brick own About 3 kg
Me own Own

2. Length and Distance

2.1 to 2.7 Recordings:

Item Estimation Actual Measurement
Head own Own
Friend’s head
Foot
Height
Tall person: height
Eye-lash
Thumb-nail: width
Longest finger: length

2.8

Item Estimation Actual Measurement
Height of door own 2m
Width of window They vary
Length of corridor
Distance to Office
Length of rugby-field
Width of soccer-field

(The size of school sports-fields are smaller than ones for adults.)

3. Measuring Capacity

Item Estimation Actual Measurement
Bucket own Usually 5 or 10 or 15
Cool drink tin Depends on size of tin
Cool drink tins in a litre packet
Tea-spoon 5 ml
Tea-spoons in a titre packet 200
Baby’s bath Depends
My bath
School swimming-pool

Pools differ in size

  • Practical (colouring matter does not give flavour)

ACTIVITY 2 problems using S.I. units

1.1

Month Rainfall in ml that month Total for that month
January 17,4
February
March 58,6
April 30,5
May
June 17,0
July 60,4

1.2 oral

1.3 yes

1.4 5 ml

1.5 half

1.6 February and May

1.7 autumn according to these figures – 89,1ml then; 77,4ml in winter so far, but the rainfall for August has not been included. (It is actually a winter rainfall area.)

1.8 123,5 ml

2.1 Gary 2.2 4,6 m is the longest jump.

3. 5 958 km

4. 380,9 km

5. 7,17 kg

ACTIVITY 3 perimeter – practical investigation

1 to 6 Own practical measurement and recording

TEST YOUR PROGRESS

1.1 6,578 kg

1.2 5 703 m

1.3 6,712 liter

1.4 0,768 m

1.5 3,4 cm

1. 5,905 m

2. 73 cm

3. 600 ml

4. 2 490 kg

5. 1,5 kg

Questions & Answers

what is mutation
Janga Reply
what is a cell
Sifune Reply
how is urine form
Sifune
what is antagonism?
mahase Reply
classification of plants, gymnosperm features.
Linsy Reply
what is the features of gymnosperm
Linsy
how many types of solid did we have
Samuel Reply
what is an ionic bond
Samuel
What is Atoms
Daprince Reply
what is fallopian tube
Merolyn
what is bladder
Merolyn
what's bulbourethral gland
Eduek Reply
urine is formed in the nephron of the renal medulla in the kidney. It starts from filtration, then selective reabsorption and finally secretion
onuoha Reply
State the evolution relation and relevance between endoplasmic reticulum and cytoskeleton as it relates to cell.
Jeremiah
what is heart
Konadu Reply
how is urine formed in human
Konadu
how is urine formed in human
Rahma
what is the diference between a cavity and a canal
Pelagie Reply
what is the causative agent of malaria
Diamond
malaria is caused by an insect called mosquito.
Naomi
Malaria is cause by female anopheles mosquito
Isaac
Malaria is caused by plasmodium Female anopheles mosquitoe is d carrier
Olalekan
a canal is more needed in a root but a cavity is a bad effect
Commander
what are pathogens
Don Reply
In biology, a pathogen (Greek: πάθος pathos "suffering", "passion" and -γενής -genēs "producer of") in the oldest and broadest sense, is anything that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ. The term pathogen came into use in the 1880s.[1][2
Zainab
A virus
Commander
Definition of respiration
Muhsin Reply
respiration is the process in which we breath in oxygen and breath out carbon dioxide
Achor
how are lungs work
Commander
where does digestion begins
Achiri Reply
in the mouth
EZEKIEL
what are the functions of follicle stimulating harmones?
Rashima Reply
stimulates the follicle to release the mature ovum into the oviduct
Davonte
what are the functions of Endocrine and pituitary gland
Chinaza
endocrine secrete hormone and regulate body process
Achor
while pituitary gland is an example of endocrine system and it's found in the Brain
Achor
what's biology?
Egbodo Reply
Biology is the study of living organisms, divided into many specialized field that cover their morphology, physiology,anatomy, behaviour,origin and distribution.
Lisah
biology is the study of life.
Alfreda
Biology is the study of how living organisms live and survive in a specific environment
Sifune
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Source:  OpenStax, Mathematics grade 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11101/1.1
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