Do you have good methods to calculate double digit multiplication quickly and mentally? Plzzz give me some good tips. WILL GIVE BRAINLIEST

It is not that hard,

Step-by-step explanation:

Lets say you have 34 45=1530

34

45

4x5=20

5x3=15

        30

mark out the 5 and change it to a 0 bring down the 0

4x4=1 6

4x3-1 2

total of

1530

Just multiply the numbers 5/4 and 5/3

carry the numbers mark out 5 and put 0 drop down 0

then do the numbers 4/4 and 4/3

let m = monomial

let t = trinomial

so, m times t = t.

monomial times a trinomial = another trinomial.