СѧԾ58
һ⣺ÿ2֣20֣
1680ƽ=________ƽף42=________=________ף80=________ʱ
2˻ÿ4ٰһΣ˻ǵ29죬ô24________ٰģ 3ںдĸС12ĸ =________+________=________+________
4һԲεˮͰʢ18ˮʢһˮͰȵȸߵԲʵľȫˮУʱͰڻ________ˮ 5a=
bôab________
=
ôxy________
6õ廨3Ԫ4֦õ壬4Ԫ3֦õ壬õõĵ۵________
7һλ4AA1ܱ3A=________
8ͼοƴһΣƴɺεڽǵĶ________
________
9ͼһεֽͼ۵ ֪Ӱֵ50
ƽףֽ________ƽף
10һ
ʼ________
ѡ⣺ÿ2֣16֣
11סúͬأߣ Ҷ߶֣סʣµúȽϣ A BҶ Cһ Dж
- 1 - / 54
12ܽΪȷع12.987.09Ļʽǣ A127 B137 C128 D138
13֪a19ôa Aֻ19 B119 C19ı Dһ38
1453סͬʱ10ôA B30 C0.3 D300
15СԲ뾶Բֱ֮Ϊ14СԲԲΪ A12 B14 C18 D116
16ķУ вױεԣ
A
B
C
D
17״ӲֽƬУ۵۳һǣ - 2 - / 54
A
B
C
D
18һ9ס6ס3ij壬и3ȵij壬ӣA36ƽ B72ƽ C108ƽ D216ƽ
⣺24֣
19и⣬ܼҪ㣺 (1)69.5817.5+13.422.5 (2) 19
(3)
+ + +
(4)[1
]
20δ֪xֵ (1)x=15%0.18 (2)x
x5=18
ġֲ⣺
- 3 - / 54