Question

1. $10 + 3\times12div6$ 5. $(13 - 8div2)\times9$ 6. $21div7\times(8 + 3)$

Explanation:

Step1: Solve multiplication and division from left - to - right for 10 + 3×12÷6

First, calculate 3×12 = 36.
$3\times12=36$
Then, calculate 36÷6 = 6.
$36\div6 = 6$
Finally, calculate 10+6 = 16.
$10 + 6=16$

Step2: Solve operations inside parentheses first for (13 - 8÷2)×9

First, calculate 8÷2 = 4 inside the parentheses.
$8\div2=4$
Then, calculate 13 - 4 = 9 inside the parentheses.
$13-4 = 9$
Finally, calculate 9×9 = 81.
$9\times9=81$

Step3: Solve operations inside parentheses first for 21÷7×(8 + 3)

First, calculate 8 + 3 = 11 inside the parentheses.
$8 + 3=11$
Then, calculate 21÷7 = 3.
$21\div7=3$
Finally, calculate 3×11 = 33.
$3\times11=33$

Answer:

1. 16
2. 81
3. 33