Page 40 - Maths Class 04

Multiplication by a 3-Digit Number Put 2 zeros at the end

of the product
Example : Multiply 464 by 400.
and multiply 464 by 4.
464 × 400 = ?

Solution : 2 1
4 6 4

× 4 0 0

1 8 5 6 0 0

Thus, 464 × 400 = 185600.

Example : Multiply 336 by 248.

336 × 248 = ?

Solution :
Step-1 : Step-2 :

Multiply by ones. Multiply by tens.

2 4 1 2
3 3 6 3 3 6

× 2 4 8 × 2 4 8

2 6 8 8 (336×8) 2 6 8 8 (336×8)

1 3 4 4 0 (336×40)

Step-3 : Step-4 :

Multiply by hundreds. Add the products.

1
3 3 6 3 3 6

× 2 4 8 × 2 4 8
1 1
2 6 8 8 (336×8) 2 6 8 8 (336×8)
1
1 3 4 4 0 (336×40) + 1 3 4 4 0 (336×40)

6 7 2 0 0 (336×200) + 6 7 2 0 0 (336×200)

8 3 3 2 8 (336×248)

Thus, 336 × 248 = 83328.

Mathematics-4 40