Which twosigns should be interchanged to make the given equation correct?
$$121 \div 11 + 54 - 9 \times 3$$ = 128
$$121 \div 11 + 54 - 9 \times 3$$ = 128
From option C,
After the interchanging sign,
$$121 - 11 + 54 \div 9 \times 3$$ = 128
$$121 - 11 + 6 \times 3$$ = 128
$$121 - 11+ 18$$ = 128
128 = 128
$$\therefore$$ The correct answer is option C.
Create a FREE account and get: