Final Cover - For Printing

Alternate method:

Even number

Divide the number by 2. Attach 0 to the right of the quotient.

Eg. : To multiply 128 ×^5

First divide 128 by 2 i.e., 128 ÷ 2 = 64

Therefore, 128 ×^ 5 = 640

Odd number

Divide the number by 2. Leave the remainder. Attach 5 to the right of the

quotient.

Eg. :Multiply 279 × 5

279 ÷ 2 = 139

Therefore, 279 × 5 = 1395

(ii) To multiply a number by 25, multiply the number by 100 and divide it by 4.

Alternate method:

Divide the number by 4. If the remainder is,

0, attach 00 to the quotient Eg : 276 × 25 = 69 00

1, attach 25 to the quotient Eg : 377 × 25 = 94 25

2, attach 50 to the quotient Eg : 458 × 25 = 114 50

3, attach 75 to the quotient Eg : 979 × 25 = 244 75

(iii) To multiply an even number by 15, multiply that number by 10 and with
the result add half of the value.

Alternate method:

Divide the number by 2. Add the quotient to the given number. Attach ‘ 0 ’

to the right of the sum.