Fill in neighboring numbers
Place values: in what place is the number?
In which place is the digit?
Counting cleverly
What is the value of the number?
Completing the number
What is the value of the digits in the number? (up to 100,000)
Divide the number by 2
Use the digits to create the lowest or the highest number
Rounding off
Put the numbers from lowest to highest value
Put the numbers in the correct order
Counting up or down with jumps
Compare the numbers up to 20,000
Compare the numbers up to 100,000
Choose the correct sign
Compare the problem and the number (1)
Compare the problem and the number (2)
Compare the problems
How many cubes do you count (up to 2,000) (multiple choice)?
How many cubes do you count (up to 5,000) (multiple choice)?
How many cubes do you count (up to 2,000)?
How many cubes do you count (up to 5,000)?
How many cubes do you count (up to 10,000) (multiple choice)?
How many cubes do you count (up to 10,000)?
Which number is shown in Roman numerals (1)?
Which normal number is shown by the binary number (1)?
Convert the number to Roman numerals
Convert the number to binary
Which number is shown in Roman numerals (2)?
Which number is shown in binary (2)?
Addition with Roman numerals
Addition with binary
Subtraction with Roman numerals
Subtraction with binary