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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:
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)
| 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:
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| 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:
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4.8 investigates and approximates (alone and/or as a member of a group or team):
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ACTIVITY 1 measuring
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
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
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