First steps to subtraction skills: Add dice pips so that sum of multiple dice is correct.
This problem can be used to introduce the complement method for substraction.
Rows of dice faces are shown. One of the dices' faces is empty. Pips have to be drawn for this dice so that the total sum of all the dice in the row equals a given value.
The number of problems and the number of rows for a problem can be selected. The Sum that all dice face have to add up to can be specified in the following way:
- ten for two or three dice, 20 for four dice
- ten for two dice, 15 for three and 20 for four dice
- a random value
Every set of rows for a problem targets the same sum. The rows of dice are seperated by lines. This may be misleading in some situations or for some audiences, it is advisable to select only a single row per problem in this case.
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