Whole Numbers

What is the value of the digit 7 in the number 2,749?

• A7
• B70
• C700✓
• D7000

Answer: In 2,749, the 7 is in the hundreds place, so its value is 700.

Write the number eight thousand, three hundred and forty-two in figures.

• A8,342✓
• B8,324
• C8,423
• D8,432

Answer: Eight thousand (8000) + three hundred (300) + forty (40) + two (2) = 8,342.

Which of these numbers is the largest?

• A5,124
• B5,214
• C5,412
• D5,421✓

Answer: Compare digit by digit from the left. All four start with 5. Two have 4 hundreds (5,421 and 5,412), so compare their tens: 2 tens beats 1 ten, making 5,421 the largest.

What is 100 more than 2,456?

• A2,456
• B2,566
• C2,346
• D2,556✓

Answer: 2,456 + 100 = 2,556. Adding 100 increases the number in the hundreds place.

Round 3,847 to the nearest 10.

• A3,800
• B3,840
• C3,850✓
• D3,900

Answer: 3,847: Look at the units digit (7). Since 7 ≥ 5, round up. 3,847 rounds to 3,850.

Round 5,632 to the nearest 100.

• A5,600✓
• B5,630
• C5,700
• D6,000

Answer: 5,632: Look at the tens digit (3). Since 3 < 5, round down. 5,632 rounds to 5,600.

What is the value of 6 in the number 16,234?

• A6
• B60
• C600
• D6000✓

Answer: In 16,234, the 6 is in the thousands place, so its value is 6,000.

Arrange these numbers from smallest to largest: 1,234 | 1,243 | 1,324 | 1,423

• A1,234, 1,324, 1,243, 1,423
• B1,243, 1,234, 1,423, 1,324
• C1,423, 1,324, 1,243, 1,234
• D1,234, 1,243, 1,324, 1,423✓

Answer: Start with the smallest number and work up: 1,234 < 1,243 < 1,324 < 1,423.

What is 1,000 less than 4,567?

• A3,567✓
• B4,467
• C4,566
• D3,657

Answer: 4,567 - 1,000 = 3,567. Subtracting 1,000 decreases the thousands place by 1.

Round 7,249 to the nearest 100.

• A7,200✓
• B7,250
• C7,300
• D7,000

Answer: To round 7,249 to the nearest 100, look at the tens digit (4). Since 4 < 5, round down to 7,200.

How many tens are there in 340?

• A3
• B4
• C34✓
• D340

Answer: 340 ÷ 10 = 34. There are 34 tens in 340.

What is the value of the 4 in 24,576?

• A4
• B40
• C400
• D4000✓

Answer: In 24,576, the 4 is in the thousands place, so its value is 4,000.

Write four thousand and five in figures.

• A4,050
• B405
• C4,500
• D4,005✓

Answer: Four thousand (4000) and five (5) = 4,005. Note: no hundreds or tens, so zeros fill those places.

What is 10 times 25?

• A250✓
• B2.5
• C35
• D215

Answer: 10 × 25 = 250. Multiplying by 10 adds a zero to the end.

Which number is closest to 5,000?

• A5,149
• B4,899
• C5,051
• D4,950✓

Answer: Work out how far each number is from 5,000: 4,950 is 50 away, 5,051 is 51 away, 4,899 is 101 away and 5,149 is 149 away. The smallest gap is 50, so 4,950 is closest.

What is 100 divided by 10?

• A1
• B10✓
• C100
• D1000

Answer: 100 ÷ 10 = 10.

If a number rounds to 2,300 (to the nearest 100), which could it be?

• A2,249
• B2,251✓
• C2,350
• D2,400

Answer: 2,251 rounds to 2,300 (tens digit is 5, so round up). 2,249 rounds to 2,200; 2,350 rounds to 2,400; 2,400 rounds to 2,400.

Complete the sequence: 100, 200, 300, ___

• A350
• B310
• C500
• D400✓

Answer: The sequence increases by 100 each time. 300 + 100 = 400.

What is 5,000 + 200 + 30 + 4?

• A5,234✓
• B5,243
• C5,324
• D5,342

Answer: 5,000 + 200 + 30 + 4 = 5,234. This is writing a number in expanded form.

What is 3 × 100?

• A300✓
• B3000
• C103
• D30

Answer: 3 × 100 = 300.

How many hundreds are in 1,500?

• A5
• B15✓
• C150
• D1500

Answer: 1,500 ÷ 100 = 15. There are 15 hundreds in 1,500.

Which is the smallest number?

• A9,687
• B9,768
• C9,876
• D9,678✓

Answer: Compare digit by digit from the left. All start with 9. Two have 6 hundreds (9,678 and 9,687), so compare their tens: 7 tens is less than 8 tens, making 9,678 the smallest.

What is the expanded form of 3,456?

• A3000 + 400 + 50 + 6✓
• B3000 + 400 + 5 + 6
• C3000 + 40 + 5 + 6
• D300 + 400 + 50 + 6

Answer: 3,456 = 3 thousands + 4 hundreds + 5 tens + 6 ones = 3000 + 400 + 50 + 6.

Round 8,564 to the nearest 1,000.

• A9,000✓
• B8,564
• C8,500
• D8,000

Answer: 8,564: Look at the hundreds digit (5). Since 5 ≥ 5, round up to 9,000.

What is 20 divided by 10?

• A2✓
• B10
• C20
• D200

Answer: 20 ÷ 10 = 2.

Four freezer temperatures are recorded: -5°C, -2°C, 0°C and 3°C. Which temperature is the coldest?

• A3°C
• B-5°C✓
• C-2°C
• D0°C

Answer: -5°C is the coldest because it is furthest to the left on a number line. The further below zero, the colder it is.

The temperature at dawn is -3°C. By midday it has risen by 8°C. What is the temperature at midday?

• A-11°C
• B5°C✓
• C-5°C
• D11°C

Answer: Start at -3 on a number line and move 8 places up: -3 + 8 = 5°C.

A freezer is at -5°C and its temperature drops by another 3°C. What is the new temperature?

• A8°C
• B-8°C✓
• C-2°C
• D2°C

Answer: Dropping means moving further down the number line: -5 - 3 = -8°C.