Practice adding and subtracting with number bonds.
Demo: math.nixy.io/bond
The player is presented with a randomly generated addition or subtraction problem, along with three possible answers. If the player selects the correct answer, they are given 5 points and a new problem is generated. If they select the wrong answer, they lose 1 point. Once the player reaches 20 points in round, their score is increased by 1. The player can ask for a free hint by clicking on the question mark.
- Problems do not exceed a sum of 20
- Problems do not include negative numbers (but they do include zero)
- Player can lose points in a round, but they cannot lose their score
Addition hints are a break down (number bond) of the two numbers to "fill in the 10s", creating a smaller problem to solve. For example, 8 + 6 becomes (8 + 2) + 4 which is 10 + 4. The hint also includes a numberline representation of the same.
Subtraction hints break down the first number into the part that is cancelled out by the second number, and the remainder. A numberline is also shown.
