Page 35 - Maths Class 05

These two processes of 2 3 5 9

multiplication are not convenient.
× 4 6 5
In actual practice, we use the
1 1 7 9 5
following method.
+ 1 4 1 5 4 ×

+ 9 4 3 6 × ×
1 0 9 6 9 3 5

(We use the × mark instead of zero.)
Practice - 2.4
Practice - 2.4
Practice - 2.4
Practice - 2.4
Find the product.

1. 9444 × 66 2. 7849 × 96 3. 6047 × 75 4. 8265 × 86
5. 1983 × 95 6. 3713 × 25 7. 9237 × 91 8. 5661 × 81

9. 2542 × 163 10. 8432 × 124 11. 5642 × 245 12. 8946 × 245

Multiplying a 5-Digit Number by a 2-Digit Number

Example : Find the product of 64321 and 84. 6 4 3 2 1

Solution : Step 1 : Multiply 64321 by 4 ones. × 8 4

64321 × 4 = 257284 2 5 7 2 8 4

Step 2 : Multiply 64321 by 8 tens. + 5 1 4 5 6 8 0
64321 × 80 = 5145680 5 4 0 2 9 6 4

Step 3 : Add the products.

257284 + 5145680 = 5402964

Multiplying a 5-Digit Number by a 3-Digit Number

Example : Multiply 84326 by 428. 8 4 3 2 6

Solution : Step 1 : Multiply 84326 by 8 ones. × 4 2 8
84326 × 8 = 674608 6 7 4 6 0 8

Step 2 : Multiply 84326 by 2 tens. + 1 6 8 6 5 2 0

84326 × 20 = 1686520 + 3 3 7 3 0 4 0 0

Step 3 : Multiply 84326 by 4 hundreds. 3 6 0 9 1 5 2 8

84326 × 400 = 33730400

Step 4 : Add the products = 674608 + 1686520 + 33730400

= 36091528

Mathematics-5 35