Find the value of $\left(5+6\right)\times6$(5+6)×6

Find the value of $\left(6-5\right)\times4$(6−5)×4

Find the value of $\left(11-4\right)\times\left(12-4\right)$(11−4)×(12−4)

Use a range of additive and simple multiplicative strategies with whole numbers, fractions, decimals, and percentages.