Study Guide
Unit 7: Weight
Chapter 1- Examples of test questions:
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Strictly speaking, the kilogram is a unit of mass (a measure of the amount of matter in the object), not of weight ( a measure of the force of gravity on an object). However, since we use the term weight in daily speech when weighing things, it will be used here.
- A quart (or liter) of water weighs about 1 kg.
- Four hundred pennies weigh about 1 kg.
- Two regular paper clips weigh about 1 gram.
- The unit cube in some base-10 sets weighs 1 gram.
- A teaspoon of water weighs 5 grams.
- A kilogram weighs 2.2 pounds, that is, a bit over two pounds. A good estimate when given the weight of a person in kilograms, for someone used to pounds, is to double that weight. A child who weighs 30 kilograms, would weigh about 60 pounds.
- 4 kg 78 g = _____ g
- 2 kg 2 g = _____ g
- 8731 g = ____ kg ___ g
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Arrange in order from lightest to heaviest and heaviest to lightest:
- 8731 g 7 kg 92 g 6 kg 821 g 3 kg
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A scale is drawn with items on top. If the scale is broken into quarters like a clock face:
- 0 is at noon
- 1 kg would be at 3
- 2 kg would be at 6
- 3 kg would be at 9
- 4 kg would also be at noon
- between the numbers is a slightly longer line that represents half way
- Smaller lines represent individual kg
- An item is on the scale. The mark is two lines past the 3 kg mark. What is the weight of the item?
- Two scales side by side. The weight of an apple is shown. The other scale shows the weight of the apple with a banana. Find the weight of the banana.
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Two items are labeled with weights: 4 kg 78 g and 9 kg 821 g. What is the total weight of the two parcels?
- What is the difference in weight between the two parcels?
- Bag A weighs 8 kg 431 g. It weighs 84 g less than Bag B. What is the weight of Bag B in grams?
- Nicolas weighed the box at 52 kg 204g. He put in a few more items and the box now weighs 58 kg. How much weight did he add into the box? ______ kg ____ g
Chapter 2- Examples of test questions:
- Chapter 2 focuses on Word Problems
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Unit bars are required to be drawn correctly for a point on the test.
- Comparison models may use two or more bars to represent the quantities being compared.
- Each part of equal value is called a unit. For instance, if the first unit bar is work 20 and the second unit bar is 5 times as large, the second unit bar should have five units drawn and 20 written in each unit.
- The box weighs 4 kg 406 g. The empty box weighs 512 g. What is the weight of the items in the box?
- The container of fruit weighed 219 g. What is the weight of 7 such containers? Give your answer in kilograms and grams.
- Parcel A weighs 84 kg. It is 2 times as heavy as Parcel B. What is the weight of Parcel B?
- 9 similar bags of cat food weigh 634 kg. How much does one bag of cat food cost?
- Two boxes weigh 69 kg. One box weighs 52 kg 397 g. What is the weight of the other box?
- The box of grapes weighs 4 kg 58 g. The box of apples weighs 873 g more than the box of grapes. What is the weight of the box of apples?
- Davis bought 8 cans of soda. They weighed 782 g. What was the weight of 3 such cans of soda?
- Nebyu’s dog weighs 94 kg. His cat weighs 6 kg less than the dog. The bird weighs 62 kg less than the cat. What does the bird weigh?
- 7 kg 502 g of concrete mix was mixed with 793 g of sand. How much more concrete must be added to make 9 kg of concrete?
- Emma sold 4 kg 189 g of flour on Day 1. Day 2 she sold 8 kg 731 g. Day 3 she sold 6 kg 392 g. If 1 kg of flour cost $6, how much did she earn in all?
Chapter 3- Examples of test questions:
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1 kg weighs 2.205 pounds or 35.28 ounces. 1 ounce has a mass of 28.35 grams. There are about 2 pounds in 1 kg. A person who weighs about 80 pounds weighs about 40 kilograms.
- A quart of water weighs about 2 lbs
- A slice of bread, about 60 paper clips, 11 pennies, or 5 quarters weigh about one ounce.
- The abbreviation for pound, lb, comes from the Latin word libra, a unit of weight.
- 5 lb = ______ oz
- 7 lb 3 oz = ______ oz
- 78 oz = ___ lb ____ oz
- Add 7 lb 3 oz and 4 oz
- Subtract 7 lb 3 oz from 9 oz
- 8 apples weigh 640 oz. One apple weighs _____ lb ____ oz
- A box of apples weighs 81 oz. 9 such boxes weigh _____ oz
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Separate scales for pounds and ounces both circular like a clock face:
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Ounces scale has 16 single marks.
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Each mark is 0 – 15
- 0 is at noon
- 8 is at 6 on the clockface
- Read the weight in ounces.
- An item is on the scale. How much would 3 of the items weigh? _____ lb ____ oz
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Each mark is 0 – 15
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Pound scale
- 0 is at noon
- 1 lb would be at 3
- 2 lb would be at 6
- 3 lb would be at 9
- 4 lb would also be at noon
- between the numbers is a slightly longer line that represents half way
- Smaller lines represent individual lb
- Read the weight as _____ lb ______ oz.
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Ounces scale has 16 single marks.
- A huge box of crayons weighed 4 lbs 7 oz. Emily gave away 8 oz of crayons. What was the weight of the remaining crayons?
- Samuel put his toy cars in three containers. The first container weighs 7 lbs 3 oz. The second container weighs 31 oz more than the first. The third container weighs 2 lbs less than the second box. What is the weight of the third box?
- Various items and weights are given in oz. Find the weight of the items. Give your answer in pounds and ounces.
Unit 7 Cumulative Test:
- Review all of Units 1 - 7