Page 45 - Start Up Mathematics_7

Answer in One Word or a Line
1. What are like fractions?

2. If the product of two fractions is 1, what can be said about the fractions?
3. What is the reciprocal of 1?
4. What is the difference between improper and mixed fractions? Can they be converted into
each other? Give an example.

5. What can be said about the value of the product of a proper and an improper fraction?
6. What is multiplicative inverse of a fraction? For which number it does not exist?
1
7. How many millimetres are there in of a metre?
5
let’s evaluate
4 7 3 5 3 7
1. Simplify: (a) 2 + 4 + 2 (b) 7 – 4 + 2
15 10 5 6 8 12
6 5 2 3
2. Arrange , , , in ascending order.
12 12 3 8
3 9 11 13
3. Arrange , , , in descending order.
7 35 14 28

2
2
1
3
4. Simplify: (a) 2 × 7 × 1 33 (b) 4 ÷ 3 ÷ 1 1
17 9 52 7 2 2
4
1
5. Mr Srinivasan spends of his income on household expenses, of his income on conveyance
7
7
and ` 2,000 per month on insurance. If his monthly income is ` 42,000, find his annual savings.
3
1
6. If the cost of a notebook is ` 12 , how many notebooks can be purchased for ` 191 ?
4 4
5
1
7. By what number should 4 be multiplied to get 9 ?
6 6
3 4
8. By what fraction should 5 be divided to get ?
7 7
Thinking Skills
6
1. A shelf is 24 cm long. How many books can be arranged on the shelf if each book is
7
1 2
4 cm wide? How many encyclopedias can fit on the shelf if each occupies 5 cm of width?
7 7
1
3
2. A cat drinks 1 litres of milk contained in a utensil having 2 litres of milk. What fraction
4 4
of milk did the cat drink?
3. A soccer team is to be selected from a group of probables numbering more than 16 but less
1
than 30 attending the training-cum-fitness camp. Amongst these probables are below the
3
1
age of 16 years. are in the age group 16 to 18 years and the remaining are above 18 years.
4
(a) How many probables attended the camp?
(b) What fraction of probables are above 18 years?

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