5.3. 14
7.300
8. 120%
9. 12.56
2, 1.× 2.× 3.× 4.×
Three, 1. C 2。 B 3。 C 4 explosive C
Volts, 6.88 square centimeters
VII. 1.240 Basket
2.320 heads
3.2607 yuan
4.32 km
5.3 hours
6. 1 cm
Page 7. 120
Comprehensive exercise 2
I. 1.4000
3.5,30, 12,60%,3:5
4.0.097
5.32.5%
6.4:5= 12: 15
9.50 24 square centimeters
10.22
2, 1.D 2。 C 3。 C 4 explosive B
3, 1.× 2. √ 3.× 4.×
6. 1.500 km
2.48 km
3.60 strains, 48 strains
4.879.2 square meters
5. 100 cm2
Comprehensive exercise 3
I. 1. 1250
36580064000
5. 1t
7.π
8. 134 cm2
9. 150.72 cubic centimeters
10.8:5
2, 1.√ 2.√ 3.√ 4.×
Three, 1. C 2。 B 3。 B
Iv. 1.879
2.0. 19
3.0.2
5.586
9. 1
10.2
V length: 6.28cm width: 2cm
Vii. Page 1.40
2.650 tons
3.1108km
4. 167%
5.609 sets
6.360 km
7. 1200
8.3768 kg
Comprehensive exercise 4
11.9050000,97805,1100 million
2.3 hours 9 minutes 3.04 square meters = 304 square meters
3.90
5.5:6
6.6,6=2×3
9.56.52 cubic centimeters
Second, 1. C 2。 C
Three, 1. √ 2.× 3.× 4.√
Iv. 1.65
2.5825
3.7.235
5.9
6.0.05
Five or four square centimeters
6. 1. 1.438+0.2
Seven, 1.58 yuan
2.50 sets
3.9 hours 6.5 hours
4.560 km
5.5%
6.42 meters
7. 100 m
Comprehensive exercise five
1 1.90000, 1 100 million
2. 4. 25 hours
3.3,72
5. 10:7
7.2
8. 1:500000
9.37.68 square centimeters
10.37.5%
2, 1.× 2.√ 3.× 4.× 5.×
Three, 1. B 2。 B 3。 C
Iv. 1.67997
2.8. 12
3. 10000
4.2
V. 10.75cm2
6， 1.3 1 2.28.8
Vii.1.1.1.1%
2. 15000 pieces
3.15km
4.900 km
6.22 meters
7.15m
Comprehensive exercise six
One,1.56666.56656666665
Proportional
3.3040
5.94%
6.5:2
7.8 and 15
2, 1.× 2.√ 3.× 4.√
Three, 1. B 2。 C 3。 C
v， 1.x= 1 2.362.5
6. 1 1.44m2
Vii. 1. 1800 vehicles
2.92
3. 196 km
4.20 ft
5.72 km
6. 18.84 m3
Comprehensive exercise 7
Step 2 be positive
3. Difference: 24.3, a decrease of 32.4.
4. 10.7 cm2
5.b
6.28 cm 3
2, 1.× 2.√ 3.× 4.×
Three, 1. B 2。 B
Four. 1.265 2.47.5
V. 1. 19698
3.0.375
4.3.5
5.4
6.6.6
Vii. 1. 3. 43 cm2
Viii. 1.20%
2. 10000
4.246 tons
5. 15 people
6.4.8 hours
7. 98. 125 square decimeter
Comprehensive exercise 8
11.158040000,1600 million.
2.3 liters 40 ml 6.75 hours
3.b，a
4.3:2
5.200
2, 1.√ 2.× 3.√ 4.√
Three, 1. C2。 C3 . a，B，D 4.B5.C
Iv. 1. 10000 2.25
V. 1.8900
3.5.62
7.2
6.1.12.x = 27.5
Seven, 375cm2
Viii. 1. 10.2 hectare
2.4 hours
36,000 tons
4.3.6 hours
5. 1 10 ton
7. 1.5 m
Comprehensive exercise 9
2. 1,3; 2,4; 2,3; 1
3.9 cm 3
3, 1.× 2.× 3. √ 4.×
4. 1. B 2。 B 3。 A, c
V. 1.2 1 2.49
Vii.1.62.5 2.11
VIII. 12.44cm3
IX.1.1.1.1%
2.360 meters
3.184.6m
4.0.65 tons
5.480 km
6. 125 days
7.42 tons
8.62.8 cm 3
9.800 km
Comprehensive exercise 10
1, 1. 124008, 120,000.
3. Axisymmetric graphics, straight lines with diameters and countless lines.
4.6,7,8
2, 1.× 2.√ 3.√ 4.× 5.×
Three, 1. a，B 2。 D 3。 B 4。 B
Iv. 1. 1500 2.624
V. 1.950
2.8
3.6
6.0.9
8.6.3
6. 1.x=24. 1 2.30
VII. 12cm2
Viii. 1.99%
2.120km
4.9. 42 cm, 7.065 cm 2
5. 14.4 hours
6.420 km
7. 105 sets
8. 1 142.96 cm2