AK STAR Grades 3-5 Operations & Algebraic Thinking. Practice it free.

The sum of the digits of $27$ is $2 + 7 = 9\textsf{,}$ and $9$ is divisible by $3\textsf{,}$ so $27$ is divisible by $3\textsf{.}$

$12 \times 11 = 132$, so $132 \div 12 = 11$.

Five $6\text{s}$ make $30$: $6\textsf{,}$ $12\textsf{,}$ $18\textsf{,}$ $24\textsf{,}$ $30\textsf{.}$

$4 \times 2 = 8$.

$37$ has only two factors, $1$ and $37$, so it is prime.

$6 \times 1 = 6$ shows multiplying by $1$ does not change the answer, so the expressions are equal in value. This is the identity property.

The last digit of $45$ is $5\textsf{,}$ so $45$ is divisible by $5\textsf{.}$

$1 \times 0 = 0$, so $0 \div 1 = 0$.