Question

(b) $5 + (8 + 9)$ $square$ $(5 + 8) + 9$
(c) $12 - (7 - 2)$ $square$ $12 - 7 - 2$

Explanation:

Step1: Calculate left side of (b)

$5+(8+9)=5+17=22$

Step2: Calculate right side of (b)

$(5+8)+9=13+9=22$

Step3: Compare (b) results

$22=22$, so fill "="

Step4: Calculate left side of (c)

$12-(7-2)=12-5=7$

Step5: Calculate right side of (c)

$12-7-2=5-2=3$

Step6: Compare (c) results

$7>3$, so fill ">"

Answer:

(b) =
(c) >