Chapter 13: Ways to Multiply and Divide

Maniratnam is the cashier of King Jayan. His job is to calculate the salary of all the workers: The cook gets ₹65 per day, the minister gets ₹195 per day, and the king's horse-keeper gets ₹86 per day. Calculate:
(a) The cook's salary for the month of January (31 days).
(b) The horse-keeper's salary for 1 full year (365 days).
(c) The minister's salary for 1 full year (365 days).

Multiply 47 × 19 using Bela's method (distributive method by splitting 19 into 9 and 10). Show each partial product.

Shantaram is a special cook who is called only on party days. Last year he was called for only 28 days. For each day he is paid ₹165. (a) How much money did he earn in all? (b) If he was paid for all 365 days of the year, how much would he have earned?

Sohanlal drank 8 glasses of water every day. (a) How many glasses will he drink in one month of 30 days? (b) How many glasses will he drink in one year (365 days)? (c) If 125 people in a village drink 8 glasses of water daily, how many glasses will they drink in one day?

A person's heart beats about 72 times in one minute. (a) How many times does it beat in 1 hour? (b) How many times does it beat in 1 full day (24 hours)?

A baby blue whale drinks around 200 litres of milk every single day! (a) How many litres of milk will it drink in 8 months (assume 30 days per month)? (b) If your family consumes 2 litres of milk daily, how many days will 200 litres of milk last your family?

Sukhi works on a farm. He is paid ₹98 for one day. If he works for 52 days, how much money does he earn?

Hariya took a loan of ₹20,000 to buy fertilizer. He has to pay back ₹2,400 every month for 10 months. (a) What is the total money he paid back? (b) How much extra money did the bank charge as interest?

A school hostel has 576 students. If each student gets 15 kg of rice per month, how much rice is needed for the hostel in one month?

A sweet maker has 250 laddoos. He packs them into boxes of 12 laddoos each. (a) How many full boxes can he make? (b) How many laddoos will be left over? (c) How many more laddoos are needed to make another full box?

A water tanker carries 4,500 litres of water to a colony. If each family is given 150 litres of water, how many families can get water from the tanker?

Dividend = (Divisor × Quotient) + Remainder. Divide 678 by 14 and verify your result using this formula.

Kamini buys a plot of land for ₹95,000. She pays ₹35,000 in cash and agrees to pay the rest in 12 equal monthly installments. How much must she pay each month?

A publishing house printed 3,456 math textbooks. They can pack 24 books in one cardboard carton. How many cartons are needed to pack all the books?

A biscuit factory produces 14,400 packets of biscuits in a day. The factory runs for 16 hours every day. How many packets are produced in one hour?

248 students and 12 teachers are going on an excursion. Each bus can seat 45 passengers. (a) How many total people are travelling? (b) How many buses must be hired so that everyone gets a seat?

Calculate: 245 × 132 showing step-by-step partial products.

Explain how 96 ÷ 16 can be solved using repeated subtraction. How many times can 16 be subtracted from 96?

A family spends ₹425 daily on groceries and food. How much do they spend in a leap year (366 days)?

Shop A sells 5 kg rice for ₹225. Shop B sells 8 kg rice for ₹344. Which shop is cheaper per kg, and by how much?

An amount of ₹72,960 is divided equally among 6 brothers. How much money does each brother receive?

Estimate the product of 48 × 73 by rounding off each number to the nearest ten. Then find the actual product and compare.

A movie theatre has 35 rows with 28 seats in each row. For the evening show, all seats were booked at ₹120 per ticket. How much money was collected?

Solve mental math divisions:
(a) 48,000 ÷ 600
(b) 35,000 ÷ 70
(c) 8,100 ÷ 90