asÂ·soÂ·ciÂ·aÂ·tive property. The property of addition and multiplication which states that a difference in the grouping of numbers being added or multiplied will not change the result, as long as the order of the numbers stays the same. For example, 3 + (4 + 5) is equal to (3 + 4) + 5. See also commutative property, distributive property. 1  Facebook.
The most common recommendation is to initially place infants to sleep on their backs for the first 12 months. However, when the infant is able to roll over on their own in to the sleep position of his/her choice than it is fine to leave the baby in that position. My children are now 29, 27, 24, and 11.
If you feel that naps are interfering with your baby's bedtime, you can wake the baby from an afternoon nap a little earlier. But if your baby is overly tired, he or she will not sleep well at night. Most babies sleep through the night with a stretch of 5 or 6 hours of sleep. continue. Follow these safety precautions with your little one: Place your baby on his or her back to sleep, not on the stomach or side. The rate of SIDS has gone way down since the The American Academy of Pediatrics (AAP) introduced this recommendation in 1992.