1Change these fractions into decimal numbers: \( \frac{3}{10} \), \( \frac{34}{100} \), \( \frac{713}{1000} \), \( \frac{191}{100} \), \( \frac{3471}{100} \).
2Multiply: \( 2 \times 2.51 \), \( 5 \times 1.25 \), \( 4 \times 12.67 \), \( 7 \times 0.923 \), \( 9 \times 9.9 \), \( 10 \times 8.297 \), \( 100 \times 0.657 \), \( 21 \times 0.21 \).
3Multiply: \( 101.03 \times 2.35 \), \( 232.01 \times 4.2 \), \( 183.31 \times 3.1 \), \( 530.12 \times 1.52 \), \( 986.41 \times 1.02 \), \( 555.76 \times 5.05 \).
4Anjila has three red coloured pencils, each 3.75 inches long. What is the total length of her red pencils?
5A square field has a side of 8.45 metres. Find the perimeter of the field.
6A rectangular garden is 7.25 metres long and 5.13 metres wide. What is its perimeter?
7One ruler costs Rs 25.50. What do 10 rulers cost altogether?
8Divide: \( 183.31 \div 10 \), \( 288.012 \div 12 \), \( 121.77 \div 11 \), \( 530.1 \div 100 \), \( 966.45 \div 15 \), \( 557.825 \div 25 \).
9A man travels 7.5 km on a motorcycle in 10 minutes. How far does he travel in one minute?
10A square field has a perimeter of 48.64 m. Find the length of its side.
11A rectangular field has an area of 248.64 m² and a length of 16 m. Find its breadth.
12A cauliflower weighing 2.85 kg costs Rs 171. What does 1 kg of cauliflower cost?
13Round off these numbers at the third, the second and the first decimal place: 5.6342, 23.472, 45.736, 78.862.
14Round off these numbers at the third, the second and the first decimal place: 0.917, 36.727, 104.983, 0.8624.
15A digital weighing scale shows the price of an item as Rs 346.72. How many rupees have to be paid?
16A cubical tank has a volume of 345.543 ft³. (i) What is the volume as a whole number? (ii) Round the volume off at the second decimal place.
17Four marigold garlands cost Rs 275 altogether. What does one garland cost? Round the answer off at the first decimal place.
18Measure your sign pen, your pencil and your bench in centimetres. Divide the length of the bench by the length of the pencil. Then round both lengths off to whole numbers, divide again, and compare the two results.
19Find \( 149.04 \div 12 \) and check whether the answer is right.
20Find the sum and the difference of 0.34 and \( \frac{23}{100} \).
21A table top is 1.25 metres long and 0.8 metres wide. Find the area of the table top.
22In \( 0.5850 \div 18 \), why is the first digit after the point in the quotient a 0? Give the reason.