2 More complex definitions of new operations
3 Cleverly calculate the score (1)
4 Clever calculation of scores (2)
Clever calculation of 5 points (3)
6 zoom method
7 valuation
Characteristics of eight-unit fraction
Split of 9 unit scores
10 Interchange of Fractions and Decimals (1)
1 1 Conversion between Fractions and Decimals (2)
12 decimal string
The sum of 13 fractional series
14 cross reduction
Simplification of 15 Complex Fraction
Application of 16 decimal system
17 1 1 multiple characteristics
18 number theory (1)
19 number theory (2)
20 plot ratio correspondence
2 1 conversion unit 1
22 Finding Invariants (1)
23 Looking for Invariants (2)
24 interest
25 the profit problem (a)
26 profit problem (2)
27 engineering problems
28 water pipe problem
29 cows eat grass (1)
30 cows eat grass (2)
3 1 The itinerary of multiple meetings.
32 Meeting and Pursuit
33 circular stroke
34 flow stroke
35 train crossing the bridge
36 clock face stroke
37 hounds chase rabbits.
38 concentration ratio (1)
39 concentration ratio (2)
Perimeter of 40 circle
A circle with an area of 4 1 (1)
42 Area of a circle (2)
43 Area of a circle (3)
44 cylinder
45 cone
46 cylinders and cones
The nature of the ratio of 47
48 proportional distribution
The basic nature of 49 proportion
50 (1)
Application of 5 1 ratio (2)
Solutions of 52 more complex column equations
application problem
53 indefinite equation
54 negative number
55 Statistics and Probability
56 inclusion and exclusion
57 Maximum and minimum values
58 at most and 58 at least.
59 logical reasoning
60 smart grid
Comprehensive test (1)
Comprehensive test (2)
Reference answer