Page 62 - Start Up Mathematics_7

Fill in the Blanks

1. Every rational number can be expressed as a ___________.
2. The expression 2.8 × 6.15 ÷ 1.23 is equal to ___________.
3. The number of digits in the decimal part of 5.68 × 3.222 is ___________.
4. The decimal number 7.6291803 rounded to nearest hundredth is ___________.
5. The value of expression 0.01 × 0.000001 × 1,000 is ___________.
6. The modulus of a decimal number located nearer to zero on a number line is ___________
than the modulus of a decimal number located further away from zero.
7. Insert appropriate symbol +, –, × or ÷.
(a) 100 ___ .01 = 1 (b) 0.001 ___ 1.01 = 1.011
(c) 88.88 ___ 8 = 11.11 (d) 1.123 ___ 0.234 = 0.889

Answer in One Word or a Line

1. What is the place value of 3 in 7.003?
2. What is the fraction equivalent to 1.6?
3. How many metres are there in 7 km?
4. Riya bought 10 litres of refined oil for ` 634.50. What is the cost of 1 litre of oil?
5. In Nagpur 1 orange costs 60 paise. What does Nupur have to pay for 10 oranges in rupees?
6. Dara drinks 2,600 mL of milk everyday. What quantity is consumed by him in litres?

let’s evaluate
1. Express the following as indicated:

(a) 1 kg 5 grams as kilogram (b) 23 cm 7 mm as metre (c) 2 litre 25 mL as litre
2. Find the product of the following:
(a) 2.378 × 10 (b) 0.0123 × 100 (c) 1.00045 × 18 (d) 1,289.56 × 12.5
3. Divide the following:
(a) 345.56 ÷ 100 (b) 56.56 ÷ 1.4 (c) 0.4422 ÷ 0.11 (d) 18.08 ÷ 40
4. Find the area of a rectangle of length 17.25 m and breadth 12.30 m.
5. A car covers 120.55 km in 10 litres of petrol. How much distance will it cover in 1 litre of
petrol?
6. A retailer sells Basmati rice at the rate of ` 71 per kg. Find what Seema had to pay for
10 kg 650 g of Basmati rice.
7. How many bottles of cough syrup can be filled from 17.28 litres of syrup, if one bottle can
hold 120 mL of syrup?
8. How many ice cream cones can be filled from 14.7 litres of ice cream if one cone can be
filled with 60 mL of ice cream?

Thinking Skills

1. Decimal numbers are formed by filling the empty boxes using each of the numerals from 1
to 9 exactly once.

7 2 5
.
The greatest number so formed is __________ and the smallest number formed is _________.

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