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1. จงหาผลลัพธ์ในรูปอย่างง่ายและมีเลขชี้กาลังเป็นบวก (ข้อละ 1 คะแนน)
1. (ab)–5
× (a2
b3
)6
2.
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3. 4.
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5. 6.
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7. 8.
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แบบฝึกหัด เรื่อง สมบัติอื่น ๆ ของเลขยกกาลัง
ชื่อ ........................................................ ชั้น ................ เลขที่ ................
25a3
b–6
8a4
b–3
2
16a5
b7
125ab
3
×
x–1
y–2
z3
2
× x–4
y2
z–3
–2
(a–3
b2
)–3
(a4
b–3
)2
(a5
b–1
)–5
(a3
b2
)3÷ a–2
b
a3
b–4 ÷
–3
ab–1
a–3
b2
5
8a–3
b–1
2a5
b4
16a–2
b–3
24a7
b–2× (x3
y–4
)(xy–1
)–2
(x–2
y)–5
(a2
b4
)–4
a–5
b–3

2. 9. 10.
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11. 12. {(7n
)–2
× (14n
)6
} ÷ (128 × 74
)n
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13. 14.
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15. 16.
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3
8x+2
× 4x–2
16x–2
2x+1
+ 2x+3
8 × 2x
7n+2
– 35 × 7n–1
7n
× 11
22x–3
+ 22x+5
23x+1
× 2x–2
(32
)2
× (27)2–n
(81)–n
× (27)3
× (3)n–1
253x–1
× 1253–x
× 5–6
53x+1
3–x+1
2–x–1
251–x
9–x
30x–1
53x–3× ÷

3. 17. 18.
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19. 20.
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5 × 3n
– 9 × 3n–2
3n
– 3n–1
6 × 2n
– 4 × 2n–2
2n+1
+ 2n–1
4n+3
15–n–1 × ×12–n+2
5n+1
1
243
3n+3
351–n × 21–n+2
5n–1