Reasonix MAC™ · Grade 4

Grade 4 — Coordinates and Conditions

Yes/no questions turn into if … else, on an (x, y) grid.

Grade 4 at Reasonix MAC: the coordinate grid, fractions, yes/no questions, and if/else conditions inside a treasure-maze game. Interactive and bilingual.

The three bridges in this grade

Mathematics

Coordinate grid (x, y), fractions ½ ¼ ¾, true/false claims

Algorithms

Selection: test a condition, take one of two branches

Coding

if touching wall [ bounce ] else [ move 10 ]

Try it right now

Move it, click it, and watch the maths, the algorithm and the code change at the same moment.

Input x = 4Multiplier m = 3Constant b = 2

y = 3·4 + 2 = 14

MATH

The rule y = m·x + b. At x = 4, y = 14. Increase x by 1 and y grows by 3.

ALGO

A function: one input, fixed steps, one output — then a condition decides what happens next.

CODE

define rule (x) → report 3 * x + 2
if rule(4) > 20 [ say "big" ] else [ say "small" ]

Grade 4 lessons

1The Coordinate Grid (x, y)
2Fractions: ½, ¼, ¾
3Yes/No Questions
4If … Then
5If … Else
6Forever + If
7Treasure Maze Game
8Two Conditions with AND

Start this grade free