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Reading and writing numbers

• How do we read and write numbers through hundreds of millions?

We do this by use of:

Groups

 What do we call each group of three digits separated by a comma in any given number?

It is called....

PERIODA

[resource: 5408, align: left]

The three periods we've talked about are...

1. Millions

2. Thousands and

3. Ones

Explain the periods in the number 360,400,295 from the greatest to the smallest

 

Answer

• 360 is in the millions periods

• 400 is in the thousands periods

• 295 is in the ones periods

forms in mathematics

Identify the standard form, word form and expanded form in the number 124,735,689

 

Answer

Standard form -    124,735,689

Word form     -     one hundred twenty-four million,seven hundred thirty-five thousand, six hundred eighty-nine

Expanded form - 100 000 000+20 000 000+4 000 000+ 700 000+30 000+5 000+600+80+9

 

Why is 'and' not used when writing in word for?

because the word 'and' should only be used when you have a decimal

• In what form is 872,263,459?

It is in standard form

 

Question

• Write 871,632,954 in expanded form

Answer

800 000 000+70 000 000+1 000 000+600 000+30 000+2 000+900+50+4

 

Question

•  Write 459,362,781 in words

Answer

Fou hundred fifty-nine million, three hundred sixty-two thousand, seven hundred eighty-one

 

Questions

Read and write the following numbers in two forms

1. Five hundred six million, fifteen thousand,

    three hundred seventy-eight

2. 802,062,543

3.900 000 000+10 000 000+2 000 000+500

   000+60 000+4 000+300+70+8

 

Answers

1. Standard form   _ 506,015,378

    Expanded form _ 500 000 000+6 000 000+10

                                    000+5 000+300+70+8

2. Word form          _ eight hundred two million,

                                 sixty-two thousand, five hundred

                                 Fourty-three

Expanded form      _ 800 000 000+2 000 000+60 000+

                                  2 000+500+40+3

3.Standard form     _ 912,564,378

Word form              _ Nine hundred twelve million,five hundred

                               sixty-four thousand, three hundred seventy-eight