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Rounding and Estimating
Representing numbers
Standard, Written and Expanded Form
Comparing,Difference and Ordering Numbers
Word Problems
100

Round 5,672 to the nearest hundred.

5,700.

100

Represent 340,125 as the sum of its place values (Expanded form)

300,000 + 40,000 + 0 + 100 + 20 + 5.

100

Write 84,329 in words.

eighty-four thousand, three hundred twenty-nine.

100

Which is greater: 25,301 or 25,130?

25,301 (is greater).

100

I have 346 apples, my friend has 412. Who has more?

Friend has more (412) — difference 66 apples.

200

Round 482,349 to the nearest thousand.

482,000.

200

Show 123,400 as tens and hundreds 

12340 tens 

1234 hundreds

200

Write “three hundred fifty thousand six hundred eight” in standard form.

350,608.

200

Which is less: −15 or −10?

−15 (is less).

200

A city has 254,672 people. Round to nearest 10,000

250,000

300

 345,721(round to nearest hundred thousand) +243 546 (round to the near hundred thousand)=

500,000

300

Write 452,903 as: (4 × 100,000) +

4×100,000 + 5×10,000 + 2×1,000 + 9×100 + 0×10 + 3×1.

300

Expand 502,341 in expanded form.

500,000 + 0 + 2,000 + 300 + 40 + 1.

300

Order least → greatest: −3, 4, −7, 2

−7, −3, 2, 4.

300

You have $456,321, friend $431,872. Who has more and by how much (Make and estimate-rough guess)

You have more; difference $24,449. (I'll take ball park estimates- + or - 5000

400

Round 6,843,201 to the nearest million.

7,000,000.

400

Show 407,005 as a sum using only addition/subtraction.

Answers will vary


Example: 400,000 + 7,000 + 5 = 407,005 (also valid: 500,000 − 90,000 − 2,995 = 407,005).

400

Write 7,041,209 in expanded form.

7,000,000 + 40,000 + 1,000 + 200 + 9.

400

Temps: Mon −3°C, Tue 2°C, Wed −1°C. Order coldest → warmest.

−3°C, −1°C, 2°C.

400

Temp was −3°C yesterday and +4°C today. What is the difference?

7°C (4 − (−3) = 7).

500

round to the nearest ten: 

57,999,997

58,000,000

500

Represent 654,321 using multiplication, division AND subtraction

Answer will vary

500

Write the following number in written form (9×1,000,000)+(8×100,000)+(3×1,000)+(5×10)+(4×1)

nine million, eight hundred three thousand, fifty-four.

500

Submarine −120 m, diver −45 m, bird +30 m. Order lowest → highest.

submarine (−120 m), diver (−45 m), bird (30 m).

500

Town A 4,567,893 and Town B 3,912,642. Round both to nearest 100,000 then find about how many more live in A.

A ≈ 4,600,000; B ≈ 3,900,000; difference ≈ 700,000.