Number Sense

Prime

100

What is the smallest prime number?

2

200

What is the next prime number after 17?

19

300

What is the prime factorization of 24?

2³ • 3

400

What is the sum of the first five prime numbers?

2 + 3 + 5 + 7 + 11 =28

500

What is the largest prime factor of 100?

5

Number Pattern

100

What is the next number in the sequence: 2, 4, 6, 8, ...?

10

200

What is the 5th term in the sequence: 1, 4, 9, 16, ...?

25

300

What is the sum of the first 5 positive even numbers?

30

400

What is the next number in the sequence: 3, 6, 9, 12, ...?

15

500

What is the product of the first 3 prime numbers?

30

Estimation

100

Estimate the product of 23 and 7.

160 (rounded)

200

Round 563.82 to the nearest hundred.

600

300

Subtract 298 from 500, then round the difference to the nearest hundred.

200 (rounding 202 to the nearest hundred)

400

Divide 675 by 25, then round the quotient to the nearest whole number.

27

500

Estimate the value of 0.501*20

10

Fraction

100

What is 3/4 + 1/4?

1

200

Express 5/8 as a decimal

0.625

300

Simplify 6/10

3/5

400

What is 2/3 of 9/10?

3/5

500

Convert 7/20 to a percentage

35%

Decimal

100

What is 3.25 + 2.75?

6

200

Subtract 1.36 from 5.25.

3.89

300

Multiply 4.5 by 3.

13.5

400

What is 1.2/0.4?

3

500

Convert 0.625 to a fraction in simplest form.

5/8