Question

is I have done all right ?
where I have left number 12 please answer me ​

Answer 1

$\small \textbf{\color{cyan}{ \fbox{\colorbox{cyan}{ \red{All are not correct}}}}}$

$\small \text \pink{\underline{\underline{{Correct answer are written in the boxes}}}} \\ \small \text \pink{\underline{ \underline{{below }} }}$

$\footnotesize\text{1. {\underline{6 tens + 3 ones = 5 tens + {\green{\fbox{13}} ones}}}}$

$\footnotesize\text{2. {\underline{5 hundreds + {\red{\fbox{8}}} tens = 4 hundreds + 18 tens}}}$

$\footnotesize\text{3. {\underline{7 thousands + 5 hundreds = 6 thousands}}} \\ \footnotesize\text{{\underline{+ {\green{\fbox{15}}} hundreds}}} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

$\footnotesize\text{4. {\underline{9 ten thousands + 0 thousand = {\red{\fbox{8}}} 10}}} \\ \footnotesize\text{{\underline{thousands + 10 thousands}}} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

$\footnotesize\text{5. {\underline{4 tens + 2 ones = 3 tens + {\green{\fbox{12}}} ones}}}$

$\footnotesize\text{6. {\underline{3 hundreds + 6 tens = {\green{\fbox{2}}} hundreds + 16 tens}}}$

$\footnotesize\text{7. {\underline{9 thousands + 7 hundreds = 8 thousands}}} \\ \footnotesize\text{{\underline{+ {\green{\fbox{17}}} hundreds}}} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

$\footnotesize\text{8. {\underline{6 lakhs + 4 ten thousands = {\green{\fbox{5}}} lakhs}}} \\ \footnotesize\text{{\underline{+ 14 ten thousands}}} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

$\footnotesize\text{9. {\underline{5 lakhs + 7 ten thousands = 4 lakhs +}}} \\ \footnotesize\text{{\underline{{\red{\fbox{17}}} 10 thousands}}} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

$\footnotesize\text{10. {\underline{3 ten lakhs + 5 lakhs = {\red{\fbox{2}}} 10 lakhs +}}} \\ \footnotesize\text{{\underline{{\red{\fbox{15}}} lakhs}}} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

$\footnotesize\text{11. {\underline{{\green{\fbox{8}}} 10 lakhs + 0 lakh = 7 ten lakhs +}}} \\ \footnotesize\text{{\underline{10 lakhs}}} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

$\footnotesize\text{12. {\underline{5 lakhs = {\color{blue}{\fbox{4}}} lakhs + {\color{blue}{\fbox{9}}} ten thousands}}} \\ \footnotesize\text{{\underline{+ {\color{blue}{\fbox{9}}} thousands \: \: \: + \: \: \: \: {\color{blue}{\fbox{9}}} hundreds}}} \\ \footnotesize\text{{\underline{+ {\color{blue}{\fbox{9}}} tens \: + \: {\color{blue}{\fbox{10}}} ones}}} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$