In the following question, by using which mathematical operators will the expression become correct?
166_765_85_12_13 = 191
+, ×, ÷, -
2
÷, -, +, ×
3
+, ÷, -, ×
4
÷, -, ×, +
In the following question, by using which mathematical operators will the expression become correct?
166_765_85_12_13 = 19