these numbers form an addition and subtraction fact family 4,6,10 choose the fact family formed by these numbers a 10-6=4 10-6=4 4+6=10 4+6=10 b 10-6=4 10-4=6 4+6=10 6+4=10 c 4+6=10 10-6=4 d 6+4=10 10-4=6 abc or d