( 1)6006400 6 10
(2)a- 1.2×b
(3) 1.4 1
(4)94 95 95
(5)502.4
(6)> < >
(7)5 28
(8) 180 cm2
(9) 1:500000
( 10)5/ 12 150
( 1 1)8 12
Page 49
No, yes, no, yes.
ccdcb
0.43 200 5 9 1/5 5 4/ 15 3/20 3/5 1
2 3/5-4x= 1.2
Solution: 4x = 2 3/5-1.2
4x=7/5
x=7/5× 1/4
x=7/20
8:x= 1/3: 1/4
1/3x=8× 1/4
1/3x=2
x=2×3
x=6