All of the following could be examples of invented strategies for obtaining the sum of two-digit numbers EXCEPT:

a) Adding on tens and then ones (For example, to solve 24 + 35, think 24 + 30 = 54 and 5 more makes 59.)
b) Using nicer numbers to estimate (For example, to solve 24 + 47, think 24 is close to 25 and 47 is closer to 45 so 24 + 47 = 25 + 45 = 70.)
c) Moving some to make 10 (For example, to solve 24 + 35, move 6 from 35 to make 24 + 6 and then add 30 to the remaining 29.)
d) Adding tens and adding ones then combining (For example, to solve 24 + 35, think 20 + 30 = 50 and 4 + 5 = 9 so 50 + 9 = 59.)


b

Education

You might also like to view...

Plausibility refers to

a. the degree to which findings can be applied to other contexts or groups. b. the degree to which a theoretical explanation fits the data and is defensible. c. the degree or relationship between the investigator and the informants. d. the degree to which the behavior of the subjects under study is consistent.

Education

Explain how teachers can deal with the memory and attention problems experienced by children with intellectual deficits.

What will be an ideal response?

Education

Collaborating with students in the assessment process affords teachers the opportunity to

a. answer questions and correct misperceptions. b. set attainable goals. c. obtain relevant information. d. all of the above.

Education

Teachers can build background for a reading assignment by

a. assigning a list of questions to be answered. b. telling students they will be quizzed on the material. c. letting students read, view, or listen to another selection on the same topic. d. all of the above.

Education