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.
To get her ready for sleep, develop a bedtime routine, and do it at the same time each night. Rock, cuddle, or read to help baby settle down. Help baby learn to comfort himself. This will help him get back to sleep on his own if he wakes up at night.Give him a pacifier, a soft toy, or a special blanket to hold, or let him suck his thumb. Also, it's important to put baby to bed while he's awake instead of letting him fall asleep while nursing or rocking.o get her ready for sleep, develop a bedtime routine, and do it at the same time each night. Rock, cuddle, or read to help baby settle down. Help baby learn to comfort himself. This will help him get back to sleep on his own if he wakes up at night.