Esa Helttula

App Store publisher on AppTrack Ninja.

Portfolio includes:

• Place Value Addition
• Place Value Subtraction
• Place Value Multiplication
• Place Value Division
• Multi-touch Fractions
• Vedic Multiplication
• Fraction as Slope
• Visual Order of Operations
• Fractions Decimals Percentages
• Whole Number Rounding
• Decimal Rounding
• Visual Multiplication Table