10. $$ 780+631-531-401= $$ 11. $$ 148+300-278+631= $$ 12. $$ 168+346-161+160= $$ 13. $$ 5631-4314+3842= $$ 14. $$ 7041-1618+9162= $$ 15. $$ 1316+1217-1168= $$ 16. $$ 4016+3218+2168= $$ 17. $$ 5361-2321+6901= $$ 18. $$ 6874+9064-9216= $$ 8

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Certainly! Here are the solutions to the arithmetic problems you've listed:

---

**10. $$ 780 + 631 - 531 - 401 = $$**

**Solution:**
$$
\begin{align*}
780 + 631 &= 1,\!411 \
1,\!411 - 531 &= 880 \
880 - 401 &= 479 \
\end{align*}
$$

**Answer:** **479**

---

**11. $$ 148 + 300 - 278 + 631 = $$**

**Solution:**
$$
\begin{align*}
148 + 300 &= 448 \
448 - 278 &= 170 \
170 + 631 &= 801 \
\end{align*}
$$

**Answer:** **801**

---

**12. $$ 168 + 346 - 161 + 160 = $$**

**Solution:**
$$
\begin{align*}
168 + 346 &= 514 \
514 - 161 &= 353 \
353 + 160 &= 513 \
\end{align*}
$$

**Answer:** **513**

---

**13. $$ 5631 - 4314 + 3842 = $$**

**Solution:**
$$
\begin{align*}
5,\!631 - 4,\!314 &= 1,\!317 \
1,\!317 + 3,\!842 &= 5,\!159 \
\end{align*}
$$

**Answer:** **5,159**

---

**14. $$ 7041 - 1618 + 9162 = $$**

**Solution:**
$$
\begin{align*}
7,\!041 - 1,\!618 &= 5,\!423 \
5,\!423 + 9,\!162 &= 14,\!585 \
\end{align*}
$$

**Answer:** **14,585**

---

**15. $$ 1316 + 1217 - 1168 = $$**

**Solution:**
$$
\begin{align*}
1,\!316 + 1,\!217 &= 2,\!533 \
2,\!533 - 1,\!168 &= 1,\!365 \
\end{align*}
$$

**Answer:** **1,365**

---

**16. $$ 4016 + 3218 + 2168 = $$**

**Solution:**
$$
\begin{align*}
4,\!016 + 3,\!218 &= 7,\!234 \
7,\!234 + 2,\!168 &= 9,\!402 \
\end{align*}
$$

**Answer:** **9,402**

---

**17. $$ 5361 - 2321 + 6901 = $$**

**Solution:**
$$
\begin{align*}
5,\!361 - 2,\!321 &= 3,\!040 \
3,\!040 + 6,\!901 &= 9,\!941 \
\end{align*}
$$

**Answer:** **9,941**

---

**18. $$ 6874 + 9064 - 9216 = $$**

**Solution:**
$$
\begin{align*}
6,\!874 + 9,\!064 &= 15,\!938 \
15,\!938 - 9,\!216 &= 6,\!722 \
\end{align*}
$$

**Answer:** **6,722**

---

If you have any more questions or need further explanations, feel free to ask!
Here are the answers to the arithmetic problems: 10. 479 11. 801 12. 513 13. 5,159 14. 14,585 15. 1,365 16. 9,402 17. 9,941 18. 6,722

10. \( 780+631-531-401= \) 11. \( 148+300-278+631= \) 12. \( 168+346-161+160= \) 13. \( 5631-4314+3842= \) 14. \( 7041-1618+9162= \) 15. \( 1316+1217-1168= \) 16. \( 4016+3218+2168= \) 17. \( 5361-2321+6901= \) 18. \( 6874+9064-9216= \) 8

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