Measuring Mass
We will discuss about measuring mass. We know that, when we put two objects in a balance scale, the pan with heavier objects always drops downwards and the pan with lighter object goes up. So, we can compare weights of two different objects using a balance and say which is heavier.
We know the vegetable seller is weighing potatoes in kilogram. The goldsmith is weighing a ring in grams. The wheat bags are weighing in quintals.
Some of the following weights are used like 10 kg, 5 kg, 2
kg, 1 kg, 500 g, 200 g, 100 g, 50 g etc.
The unit of weight is the gram. Kilogram is a bigger unit of weight.
1 kilogram is equal to 1000 grams
or
1000 grams is equal to 1 kilogram
We write gram as 'g' and kilogram as 'kg' in short form.
1 kg is equal to 1000 g
or
1000 g is equal to 1 kg
Write the unit of
weight in which we will use to measure the following:
(i) eraser
(ii) biscuit packet
(iii) four toffees
(iv) your weight
(v) soapbar
(vi) gold ring
(vii) bag of rice
(viii) your suitcase and bedding
Extra questions for sharp students on measuring mass!
1. Find the total
weight in kg. 2 kg sugar, 3 kg flour and 1 kg onion.
2. Sam weighs 45
kg and Aaron weighs 56 kg. What is their total weight?
3. John bought 2
kg apples, 4 kg mangoes, 1 kg pears and put them in his bag. Find the total
weight of the fruits in his bag.
4. Three brothers
weigh 30 kg, 25 kg and 45 kg. Find their total weight.
5. A man weighs
72 kg and his wife weighs 59 kg. How much does the man weigh more than his
wife?
6. Papaya sells
at $16 per kg. Find the cost of 4 kg of these papayas.
7. A bag of wheat
weighs 25 kg. Find the total weight of 8 such bags.
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2nd Grade Math Practice
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