这些数学报纸题怎么做?
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1. d
2. c
3. c
4. a
5. AC<AB, AB>BC,AC+BC=AB
6.AB<AC+BC,斜线比横线长,两个斜线肯定长过横线
7. MN=36, MN:QN = 3:1
8. bc = 7-4 = 3,
ac = 3x2 = 6
ad=6+4 = 10
9. bc = 1, ad=3
bd =2 + 3 = 5
cd = 5+1 = 6
10. b= 2a, c = 2b
c = 4a
a + b + c=7
a +2a + 4a = 7
7a = 7
a=1
b = 2a = 2
c =4a = 4
2. c
3. c
4. a
5. AC<AB, AB>BC,AC+BC=AB
6.AB<AC+BC,斜线比横线长,两个斜线肯定长过横线
7. MN=36, MN:QN = 3:1
8. bc = 7-4 = 3,
ac = 3x2 = 6
ad=6+4 = 10
9. bc = 1, ad=3
bd =2 + 3 = 5
cd = 5+1 = 6
10. b= 2a, c = 2b
c = 4a
a + b + c=7
a +2a + 4a = 7
7a = 7
a=1
b = 2a = 2
c =4a = 4
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