Page 45 - Math 4

Fundamental Operations Fundamental Operations

3.5 Row and column multiplication
Let's investigate the idea about row and column multiplication from the

illustration given below.
C1 C2 C3
5 columns of 3 children
R1 R1, R2, R3, R4, R5 are rows
5 rows of 3 children
R2
5 × 3 = 15 children

R3 3 rows of 5 children
C1, C2, C3 are columns
R4
3 columns of 5 children 5 × 3 = 15 children
3 × 5 = 15 children
R5 or 3 × 5 = 15 children

Classwork - Exercise

Let's tell and write the answers as quickly as possible.

1. a) Number of rows = b) Number of rows =

Number of columns = Number of columns =

2. a) How many chairs? b) How many eggs? c) How many children?

× = chairs × = eggs × = children
3.6 Multiplication facts

Classwork - Exercise

1. Let's tell and write the products as quickly as possible.

a) 5 × 1 = , 7 × 1 = , 10 × 1 = , 12 × 1 =
Fact I: The product of any number and 1 is the number itself.

43
43
vedanta Excel in Mathematics - Book 4
Approved by Curriculum Development Centre, Sanothimi, Bhaktapur v edanta Ex c e l in Mathematics - Book 4