Nummòlt's elementary math games & tools:
obbl & math toys
Online Math toys, construction toys and logic toys:
OPEN ENDED TOOLS
Adding apples and oranges
Adding apples and oranges - Mental algebra, with a pre-algebra tool introducing the Gaussian elimination (2*2) (Web version)
Adding apples and oranges on Google PlayQR code to Adding Apples and Oranges (Android 2.2 and up - free version)
Adding apples and oranges on Samsung apps
AandO_1DThere's also the full version of 'Apples and Oranges 1 Decimal' on Google Play: (1€)
How much pizza
How much pizza to order? - Adding fractions - Common denominator - With many kinds of Italian pizza
Free Android Version (2.2 and up): How much pizza to order? AandO_1D
Math Water Table. (former obbliq) area workshop
Math Water Table - (former obbliq) Area workshop, liquid simulator.
MWT Ideas: (Youtube Playlist)
Adding apples and oranges
Adding apples oranges and pears - Mental algebra, with a pre-algebra tool introducing the Gaussian elimination (3*3)
Adding apples oranges pears and lemons - Mental algebra, with a pre-algebra tool introducing the Gaussian elimination (4*4)
Slow fast cats: pre algebra: Animated algebra, Graphic algebra: To solve Cats and Mice problems.
Slow Fast Math Cats - Interactive Pre Algebra
Crossing the river with wolf, goat and cabbage - Logic game: Logic animation, Interactive logic.
Crossing the river with a wolf, a goat and a cabbage - Interactive logic
Time calculator: Time subtraction


Time calculator: Time subtraction
Encryption tool for kids: Encrypt or decrypt text
Elementary encryption tool: Encrypt or decrypt your text
Dancing Numbers: Divisibility and modular arithmetic
Dancing Numbers: Divisibility and modular arithmetic
Temperature converter: Fahrenheit, Celsius, Kelvin. Animated thermometer, with preloaded temperatures: From Absolute Zero to the temperature of solar crown. Graphic output, draggable and zoomable!
Fahrenheit Celsius Kelvin converter
Spelling fractions
Spelling fractions
Fraction pie tool: Helping tool to add old egyptian fractions
Fraction pie tool (web version)
Fraction pie tool (included in the Old Egyptian fractions for Android)
Egyptian Fractions. To add egyptian fractions
Old Egyptian Fractions (web version)
Old Egyptian Fractions (Free Android version at Google Play)
Place value. To subtract candles in place value cakes
Place value cakes
nummolt / ninedigits workshop. To play with digits
Ninedigits workshop
ninedigits workshop Android app
nummolt / mathcats balance. To play with fractions and rational numbers
mathcats balance
nummolt / mathcats obbl. To play with architecture blocks
mathcats obbl architecture blocks
obblog  To play with logic blocks
obblog 2 (logic blocks)
OBBL: Construction toybox - Build online with architect blocks. Gravity simulator.
obbl- architecture blocks
OBBLOG: Construction toybox: Build online with logic blocks. To make logic constructions. Binary logic simulator
obblog 2 - logic blocks
OBBLIQ: Construction toybox: Area laboratory; Container blocks and math liquid. Liquid simulator
obbliq- container blocks
ninedigits workshop & Math Cats balance & Mathcats OBBL (c) 2003 Wendy Petti of MathCats & Maurici Carbó of nummòlt
obbl, obblog, obbliq, Apples & Oranges (web & Android), How Much Pizza (c) 1999-2013 Maurici Carbó of nummòlt
OBBL - Joguines matemàtiques en Català
OBBL - Juguetes matemàticos en Castellano