Converting hexadecimal, binary and decimal numbers.
You'll learn how to write numbers as Roman numerals as well as write Roman numerals back into standard numerals.
Adding, Subtracting, Multiplying, and Dividing Integers
Number Spellings - Large Numbers
Choose the correct written number alternative
Fewest Coins (Red)
Exchanging quarters, dimes, nickels, and pennies for the fewest coins possible at the lowest level of differentiation
加加看 : 添加分数 (Adding Fractions)