## Related questions with answers

Julia commutes to work on the train 4 times each week. A round-trip ticket costs $7.25. What is herweekly cost for tickets? Use mental math.

Solutions

VerifiedThe cost of ticket is $7.25$,using mental math we can write the cost of ticket as $(7+0.25)$ To solve the problem multiply the cost of ticket to $4$ . So,

$4\cdot(7+0.25)=28+1=29$

Therefore,the weekly cost for ticket is $29$

Using distributive property, show the cost of ticket as the sum of two numbers, which is easier to multiply through mental math.

$\begin{gather*} 7 + 0.25 = 7.25 \end{gather*}$

$\begin{align*} &= 4(7 + 0.25) && \text{Write given as distributive property}\\ &= 28 + 1&& \text{Expand by multiplying}\\ &= \boldsymbol{29} && \text{Add the values} \end{align*}$

If Julia commutes only 4 time a week. Then, just multiply the cost of round trip to 4. \par $4 \times 7.25$ \par $4 \times 7.25 = 29$

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