Question

70 tens -8 ones is equal to ??

Answer 1

$$\begin{gathered} 70\mathrm{tens}=70\times 10=700 \\ \mathrm{and}8\mathrm{ones}=8\times 1=8 \\ \mathrm{So},70\mathrm{tens}-8\mathrm{ones}=700-8=692 \end{gathered}$$