Slide 1 of 6, 15 red counters and three yellow counters with number cards 18, 3 and 15, Fact families are made from three numbers. The numbers in this fact family are 18, 3 and 15. 18 is our whole, 15 represents the red counters and 3 represents the yellow counters.
A part whole model can be helpful when working out simple calculations. They are a visual representation of writing out number sentences and can help solve missing fact family numbers.
Slide 1 of 5, 8 red counters and 7 yellow counters. Additions and subtractions 8 + 7 =15, 7 + 8 = 15, 15 - 7 = 8, 15 - 8 =7, Here is a different fact family. In this case, there are 8 red counters and 7 yellow counters, so the three numbers in this fact family are 8, 7 and 15.
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