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Think and Answer
Look at the Laddoo tray in the pictures and answer the following
questions.
1. Are rows and columns interchanged in the arrangement of Laddoos?
2. Which property of numbers is illustrated in the picture?
3. Is 7 twos = 2 fives?

One and Zero in Multiplication

Multiplication by 1
Look at the pictures given below. How many parrots are there in cages?

1 + 1 + 1 + 1 = 4

4 groups of 1 parrot each = 4
So, 4 × 1 = 4

Here, 1 group of 4 parrots = 4
So, 1 × 4 = 4

If we multiply any number by 1, we get the same number.

Multiplication by 0

Look at the pictures of cages shown alongside. How many
parrots are there in the cages?

We know that: 0 + 0 = 0
2 groups of 0 parrots each = 0

So, 2 × 0 = 0

If we multiply any number by 0, we get 0.

doubles

Double means two times of a number.

Nidhi has three erasers. Shruti has double that number.

3 erasers 6 erasers or 3 × 2 = 6 erasers

Mathematics-2 99