A) \[~+,\text{ }-,\text{ }\times \]
B) \[\times ,\text{ }+,\text{ }-\]
C) \[\times ,\div ,-\]
D) \[\times ,\text{ }-,\text{ }+\]
Correct Answer: D
Solution :
Solving from the choices: [a] Inserting the signs \[\left( +,\text{ }-,\text{ }\times \right)\] We get, \[70\text{ }+\text{ }7-\text{ }113~\times 13\text{ }=\text{ }390\] [Use ?BODMAS? rule] \[77\text{ }-\text{ }1469\text{ }=\text{ }390\Rightarrow ~-\text{ }1392\ne ~390\] [b] Inserting the signs\[(\times ,\text{ }+,\text{ }-)\] We get, \[70~\times 7+\text{ }113-13=390\] [Use ?BODMAS? rule] \[490+100=390\Rightarrow ~590~\ne 390\] [c] Inserting the signs\[(\times ,\div ,-)\] We get, \[70\times ~7\div ~113-13=390\] [Use ?BODMAS? rule] \[4.33-13=390\Rightarrow -~8.67\ne ~390\] [d] Inserting the signs\[(\times ,-,+)\] We get, \[\] [Use ?BODMAS? rule] \[490-100-390\Rightarrow ~390=390\]
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