Topic 1 and Topic 2 Review

Round to nearest 100 thousands

100

Round to the nearest hundred thousand

119,000

100,000

200

Round to the nearest hundred thousand

167,200

200,000

300

Which of the following rounds to the nearest hundred thousand?

9,999

109,999

201,999

119,000

109,999

119,000

400

Round to the nearest hundred thousand

1,275,600

1,300,000

Expanded/ Name Form

100

Write  2,653 in expanded form

2,000+600+50+3

or

2,000+600+53

200

Write 25,450 in expanded and number form

25,000+400+50 

twenty five thousand four hundred and fifty

300

Write 175,250 in number form

one hundred seventy five thousand two hundred and fifty

400

Josh wrote 65,650 as sixty thousand and five six hundred and fifty. Is the correct? If not what is the correct answer?

No it is sixty five thousand six hundred and fifty

Find the sum (+) or difference (-)

100

Find the sum (+)

1,089+961

1,089+961= 2,050

200

Find the difference (-)

47,676-16,521

47,676-16,521= 31,155

300

Find the sum (+)

995,275+4,921

995,275+4,921= 1,000,196

400

Find the difference (-)

735,184-225,863

735,184-225,863= 479,321

Estimate the sum or difference by rounding

100

Estimate to find the sum

160+220

160- > (200)

220- > (200)

200+200= 400

200

Estimate to find the difference 

1440-933

1440- >(1400)

933-> (900)

1400-900= 500

300

Estimate to find the difference 

55,748-28,392

55,748-> (60,000)

28,392- > (30,000)

60,000-30,000= 30,000

400

Estimate to find the sum 

(hint: round the ten thousands place)

652,198+49,753

652,198 -> (650,000)

49,753-> (50,000)

650,000+50,000 = 700,000