Page 38 - Math Skill - 4

Multiplic
3 3 Multiplication and Divisionation and Division

Learning Outcomes
� Multiplication by 2-digit and 3-digit Number � Division by 2-digit number
� Properties of Multiplication � Properties of Division
� Estimation of Products � Mathematical Problems in Real Life
� Division

Boot-Up

Vikas and his friends went to watch a cricket match in which Vikas’s brother Sanjay was playing.

Altogether, Sanjay has scored (48 + 48 + 48 + 48 + 48 = _________) runs.

This is the same as 48 × 5 = 240 runs as multiplication means repeated addition.
H T O

4 8
× 5
2 4 0

Verification

48 × 5 = 240
or we can say that
4 8

5 2 4 0
– 2 0
4 0

– 4 0
×

i.e. 240 ÷ 5 = 48
‘‘Multiplication is a process of repeated addition of a number itself and multiplication is quicker than
repeated addition.’’

‘‘Division is an inverse process of multiplication.’’

We have already learnt to multiply 3-digit and 4-digit numbers by 1 and 2-digit numbers
respectively in previous class. Let us learn further.