數學課本解答/純數學1/第一章

習題1A

1.

1. $9x$
2. $p-13$
3. $k-4m+4n$
4. $0$
5. $r+2s-15t$

2.

1. $4(x+2y)$
2. $3(4a+5b-6c)$
3. $12(6f+3g-4h)$
4. $p(p-q+r)$
5. $12k(k+12m-6n)$

3.

1. $28(x+y)$
2. $7b+13c$
3. $-p+24q+33r$
4. $2(5l+3w-h)$
5. $2(w+2v)$

4.

1. $2ab$
2. $km-mn$
3. $2pq-sq$

4. $4x+8$
5. $-2$

5.

1. $6x^{3}y^{2}$
2. $30a^{3}b^{3}c^{4}$
3. $k^{2}m^{2}n^{2}$
4. $162p^{4}q^{4}r^{4}$
5. $24r^{2}s^{2}t^{2}u^{2}$

6.

1. ${b} \over {c}$
2. ${e} \over {2f}$
3. ${x} \over {5}$
4. $2a$
5. ${2} \over {pr}$

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5. ${\displaystyle }$

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