Question

Multiply :

$42\times 9$

Answer 1

Step 1 : First multiply ones place

$2\times 9=18$

Write $8$ at ones place column

Step 2 : Multiply tens place

$4\times 9=36$

Add $36$ with $1$ as carry $1$taken from ones place

$\Rightarrow 36+1=37$

Write $37$ at tens place column

so we get,

$42\times 9378$

Hence, required solution is $378$