2 groups of 4, 3 groups of 5, 4 groups of 3 , , 2 groups of 4, 4 groups of 3, 4 groups of 4 , How many altogether?, 6, 8, 4 , 2, How many groups?, 6 groups, 8 groups, 4 groups, 2 groups, How many altogether?, 15, 12, 3, 5, How many altogether?, 15 groups, 12 groups, 3 groups, 5 groups, , 2 groups of 6, 6 groups of 3, 3 groups of 5, , 4 groups of 3, 2 groups of 3, 2 groups of 2, , 4 groups of 5, 6 groups of 4, 4 groups of 6, Are these groups equal?, yes, no, Are these groups equal?, yes, no, Are these groups equal?, yes, no, Are these groups equal?, yes, no, Are these groups equal?, yes, no.

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