Question

( 39* 42 - 37* 42) :42

Answer 1

\(\left(39\times42-37\times42\right):42\)

\(=\left[42\left(39-37\right)\right]:42\)

\(=42.2:42=84:42\)

\(=2\)

Answer 2

\(\left(39\cdot42-37\cdot42\right)\text{ : }42\)

\(=\left[42\left(39-37\right)\right]\text{ : }42\)

\(=\left[42\cdot2\right]\text{: }42\)

\(=84\text{ : }42\)

\(=2\)

Answer 3

\(\left(39\cdot42-37\cdot42\right)\text{ : }42\)

\(=\left[42\left(39-37\right)\right]\text{ : }42\)

\(=\left[42\cdot2\right]\text{: }42\)

\(=84\text{ : }42\)

\(=2\)

Answer 4

( 39 .  42 - 37 . 42) : 42

= [ 42 (39 - 37) ] : 42

= (42 . 2) : 42

= 84 : 42

= 2

Answer 5

(39x42-37x42) : 42

=[42939-370]:42

= 42x2:42

=84: 42

=2