Different methods for calculating the result of 6x 12. There are at least two ways.

=6×( 10+2)

=60+ 12

=72

Or:

6× 12

=(5+ 1)× 12

=5× 12+ 12

=60+ 12

=72

Extended data:

Multiplication:

1) multiplicative commutative law: A * B = B * A

2) Multiplicative associative law: a*b*c=(a*b)*c=a*(b*c)

3) Multiplicative distribution law: (a+b) * c = a * c+b * c; (a-b)*c=a*c-b*c

Department:

The quotient of 1) is invariant, that is, the dividend and divisor are multiplied or divided by a number (except zero), and the quotient is invariant.

a/b=(a*n)/(b*n)=(a/n)/(b/n)

2) The sum (difference) of two numbers is divided by a number, which can be used to divide the two numbers separately (in the case of divisible division), and then the sum (difference) of two quotients can be found.

(a+b)/c = a/c+b/c； (a-b)/c=a/c-b/c