Question

A) Multiply 82 X 34 with math workings
b) multiply 69 x 12 with math working ​

Answer 1

Let's use the easiest breaking method to solve:

#a

• 82 = 80+2
• 34 = 30+4

Multiply each term of 82 by each broken term of 34, i.e.

`\tt \multimap \: 80 * (30 + 4) + 2 * (30 + 4)`

`\tt \\rightarrow \: 80 * 34 + 2 * 34`

`\tt \Rrightarrow \: 2720 + 68`

`\tt \rightharpoonup \: 2788`

#b

• 69 = 70-1
• 12 = 10+2

Multiply each term of 69 by each broken term of 12, i.e.

`\sf \multimap \: 70 * (10 + 2) - 1(10 + 2)`

`\sf \\rightarrow \: 70 * 12 - 1 * 12`

`\sf \Rrightarrow \: 840 - 12`

`\sf \rightharpoondown \: 828`