Mathematics: Class 1 — Chapter 11: How Many Times?

11.1 A Visit to an Amusement Park

A group of children visited an amusement park and explored different rides to understand the concept of repeated addition as a foundation for multiplication.

11.1.1 The Horse Swing

On the horse swing, $2$ children can sit on each horse. There are $4$ horses in total.

  • Addition representation: $2 + 2 + 2 + 2 = 8$
  • Total children: $8$ of us can sit on the horse swing altogether.

11.1.2 The Toy Train

In the toy train, $3$ children can sit in each bogie. There are $3$ bogies in total.

  • Addition representation: $3 + 3 + 3 = 9$
  • Total children: $9$ children can sit in $3$ bogies.

11.1.3 The Big Wheel

On the big wheel, $4$ children can sit together in each compartment. There are $5$ compartments in total.

  • Addition representation: $4 + 4 + 4 + 4 + 4 = 20$
  • Total children: $20$ children can sit in the swing.
11.2 Eating Jalebis

After riding on the swings, the children planned to eat jalebis. Each plate of jalebi has $3$ pieces. They ordered $6$ plates of jalebis.

11.3 Travelling in the Bus

The children travel back in a bus, observing groups of people and objects inside the bus.

11.3.1 People in the Bus

There are $9$ groups of $2$ people sitting by the windows of the bus.

  • Addition representation: $2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = 18$
  • Multiplication representation: $9 \text{ times } 2 = 18$
  • Total number of people in the bus: $18$

11.3.2 Crates of Water Bottles

Some crates of water bottles are kept in the bus. There are $4$ crates, and each crate contains $5$ bottles.

  • Addition representation: $5 + 5 + 5 + 5 = 20$
  • Multiplication representation: $4 \text{ times } 5 = 20$
  • Total number of bottles in the bus: $20$
11.4 Finding Totals of Items Bought

Cheenu bought some packs of erasers, pencils, and apples from the shop. Let's find the total of each item.

A. Erasers

There are $4$ packs of erasers, with each pack containing $2$ erasers.

  • Addition representation: $2 + 2 + 2 + 2 = 8$ erasers
  • Multiplication representation: $4 \text{ times } 2 = 8$
  • Total number of erasers: $8$

B. Pencils

There are $5$ packets of pencils, with each packet containing $3$ pencils.

  • Addition representation: $3 + 3 + 3 + 3 + 3 = 15$ pencils
  • Multiplication representation: $5 \text{ times } 3 = 15$
  • Total number of pencils: $15$

C. Apples

There are $3$ baskets of apples, with each basket containing $3$ apples.

  • Addition representation: $3 + 3 + 3 = 9$ apples
  • Multiplication representation: $3 \text{ times } 3 = 9$
  • Total number of apples: $9$
11.5 Project Work

Draw a cycle wheel. Ask your friends or find out how many cycles you have at home. Find out the total number of wheels in all the cycles.