What is the reason why mental calculations estimates are more complex?
a. They require a deep knowledge of how numbers work.
b. They require a solid knowledge of division procedures.
c. They require a deep knowledge of partitioning.
d. They require a solid knowledge of multiplication procedures.
a
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When several centers band together to purchase large quantities of items at reduced prices, it is called ___
a. ?shared buying b. ?cooperative buying c. ?team buying d. ?collaborative buying
Research has shown that children learn better from a repressive teacher than from one who is easier going
Indicate whether the statement is true or false.
According to a U.S. study, how many more girls in the 1990s compared to girls in the 1970s reached menarche before the age of 12?
a. Twice as many b. Half as many c. One-quarter as many d. About the same number
In the past, caregivers were told to let their baby cry, to avoid reinforcing this behavior. What happens when caregivers respond promptly to a crying infant?
the amount of crying increases the frequency of crying increases crying is reduced, not increased there is no change in the amount or frequency of cying