Sagot :
Answer:
A.
1. 321
2. 23
3. 36
B.
4. Rio's answer is correct.
Step by step Explanation
USE PEMDAS.
A.
1.
= 9×6²-3
= 9×36-3
= 324-3
= 321
2.
= 3²+3²+5
= 9+9+5
= 18+5
= 23
3.
= 12+6×2²
= 12+6×4
= 12+24
= 36
B.
4.
= 40-2×[10]
= 40-2×10
= 40-20
= 20
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