Exponents
Decimals
Rounding
Expanded, Word, and Standard form
Challenge Questions
100
What is 74?

196

100

3.4+5.789

9.189

100

Round 23.56 to the nearest tenth.

23.6

100

What is 34.563 in expanded form? 

(3x10)+(4x1)+[5x(1/10)]+[6x(1/100)]+[3x(1/1000)]

100

A store sold items for $19.78, $24.56, and $35.49.

Estimate the total to the nearest ten dollars, then find the exact total.


Estimate:
20 + 20 + 40 = $80

Exact:
19.78 + 24.56 + 35.49 = $79.83

200

What is the value of 105?  

10x10x10x10x10 or 100,000

200
15.863-9.54=

6.323

200

Round 0.123 to the nearest hundredths place.

0.12

200

What is three-thousand eighty-two and two hundred fifty-eight thousandths in standard form?

82.258

200

(0.5)3+(2.0)2

4.125

300

3.897x107

38,970,000

300

4.61x5.032

23.197

300

Do these numbers round to 82.57 when rounded to the nearest hundredth?

A) 82.564
B) 82.565
C) 82.569
D) 82.571

b,c,d 

300

What is (3x1000)+(4x10)+(1x1)+[4x(1/100)]+[5x(1/1000)] in word form?

three thousand forty-one and forty-five thousandths

300

A student is saving money for a trip. She earns $4.75 each day for 5 days. Then she spends $6.80 on a book. After that, she divides the remaining money equally into 4 envelopes to save.

How much money is in each envelope? Write the answer in standard, word and expanded form 

Four and two thousand three hundred seventy-five ten-thousandths.

4.2375

400

83.768 ÷ 104

0.0083768

400

63.0÷0.9

70

400

A number is 7.846.

  • Round it to the nearest tenth
  • Then round it to the nearest whole number
  • 7.8 (nearest tenth)
  • 8 (nearest whole number)
400
Can you write the answer to this problem in word form?

34.78+2.435= 

Thirty-seven and two hundred fifteen thousandths.

400

A runner jogs 2.75 miles each day for 4 days. Then she runs 1.5 fewer miles on the fifth day than her daily average.

How many total miles did she run?

Step 1:
2.75 × 4 = 11

Step 2 (average):
11 ÷ 4 = 2.75

Step 3 (fifth day):
2.75 − 1.5 = 1.25

Step 4 (total):
11 + 1.25 = 12.25 miles

500

Choose the number that has a 3 with a value 100 times greater than the 3 in 423,125.

a. 123,456

b.78,392

c. 1,346,829

d. 23,004,238

c. 1,346,829

500

A student buys 3 notebooks that cost $2.45 each. She then pays with a $10 bill.

How much change should she receive?

$2.65 in change

500

A teacher is buying supplies for her class. She buys a pack of markers for $3.78, a notebook for $2.49, and stickers for $1.65.

About how much money will she spend in total? (Estimate to the nearest dollar.)

About $8


500

Write the answer to this problem using all forms possible. 

4.52x23.7=

107.124

one hundred seven and one hundred twenty-four thousandths

(1x100)+(1x7)+[1x(1/10)]+[2x(1/100)]+[4x(1/1000)]

500

A number is 3.45.

  • Multiply it by 24.2
  • Round the result to the nearest tenth
  • Then write the answer in word form

83.5

eighty-three and 5 tenths

M
e
n
u