6. TBQ - Find the expression for the total cost

Amu, Charan, Madhu, and John went to a hotel and ordered four dosas. Each dosa cost \(₹ ​39​\), and they wish to thank the waiter by tipping \(₹​4​\). Write an expression describing the total cost. 

 

Ans: ​\(39 \times 4 + 4\)\(39 \times 4 + 5\)\(4 \times 39 + 5\)\(4 \times 4 + 39\)​ \(=\) ​

 

If the total number of friends goes up to ​7​ and the tip remains the same, how much will they have to pay? Write an expression for this situation and identify its terms.

 

Expression: ​\(39 \times 7 + 4\)\(39 \times 4 + 7\)\(4 \times 7 + 39\)

Terms in expression: ​\(4 \times 7\), \(39\)\(39 \times 4\), \(7\)\(39 \times 7\), \(4\)​