Question

shortcut method of 7804×5
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Answer 1

Answer:

This is an interesting step. Now multiply last digit first value and first digit of second value and vice-versa. Then we add outcomes. But we need the last number that is 8 here.

multiplication shortcut trick

Answer 2

Answer:

Actually multiples of five is easy.

Let me say you a trick.

Multiples of five are 'half the given number X10'

For example,

$9 \times 5 = ( \frac{9}{2} ) \times 10 \: \: \: \: \: (half \: of \: the \: givn \: number \times 10) \\ = 4.5 \times 10 \\ = 45$

Similarly,

$7804 \times 5 = ( \frac{7804}{2} ) \times 10 \\ = 3902 \times 10 \\ = 39020$

I think this is useful.

Pls mark me as the brainliest.......