SUBJECT
Juvenile literature
Mathematics
Examinations, questions, problems, exercises, etc
3
Arithmetic
2
Aerodynamics, Supersonic
1
Angle
1
Area measurement
1
Balancing
1
Calculating machines
1
Caricatures and cartoons
1
Cartoons and comics
1
Circles
1
Civilization
1
Computers
1
Electronic data processing
1
Estimation theory
1
Examinations, questions, problem, exercises, etc
1
Fractions
1
Games in mathematics education
1
Graphic methods
1
Graphing
1
Handicraft
1
History
1
Juvenile literature
1
Mathematical recreations
1
Measurement
1
Measurements
1
Measuring
1
Mensuration
1
Multiplication
1
Multiplication Tables
1
Number concept
1
Number systems
1
Numerations
1
Probabilites
1
Problems, exercises, etc
1
Quinary system
1
Rectangle
1
Science
1
Shades and shadows
1
SpiralsJuvenile literature
1
Statistics
1
Study and teaching
1
Symmetry
1
Topology
1
Weighing
1