11-12-2015
Mathematics

contestada

break apart the addends to find the sum 18+21

Respuesta :

WorldCitizen WorldCitizen

11-12-2015

we break apart the first numer:

10+8

the second:

20+1

and add like this:

18+21=10+8 + 20+1

now, we can mix up the order:

18+21=10+8 + 20+1= 10+20 + 8+1

add the parts:

18+21=10+8 + 20+1= 10+20 + 8+1=30+9=39

Answer Link

Otras preguntas

Cuneiform was used in _____.

Can someone please help me solve and explain please?

Pauline's Pecan Pies collected the following production information relating to November's baking operations:

Consider a double-pipe counter-flow heat exchanger. In order to enhance its heat transfer, the length of the heat exchanger is doubled. Will the effectiveness o

Suppose there is an ordinary deductible of $40 and the maximum payment by the insurer is $130. Determine the standard deviation of annual losses incurred by the

To be effective, market researchers must ___________ collect, record, analyze, and interpret data. Group of answer choices systematically occasionally eventuall

Instructions: Find the following information using the given image. Here we are trying to find the altitude Hypotenuse: 100 Segment Adjacent to the Leg: 36 X=

In establishing a constructive climate for his or her class, what kind of structure has each professor put in place? How would you describe the group norms for

How can you make someone more likely to change their opinion? Use the word "prime."

The Absolute Zero Co. just issued a dividend of $2.65 per share on its common stock. The company is expected to maintain a constant 5.5 percent growth rate in i