Mastering Numbers: Quiz on Operations

Order the following whole numbers from smallest to largest: 2345, 6789, 1234, 4567.

• 6789, 4567, 2345, 1234

• 1234, 2345, 4567, 6789

• 2345, 1234, 6789, 4567

• 4567, 6789, 1234, 2345

Answer explanation

To order the numbers 2345, 6789, 1234, and 4567 from smallest to largest, we compare their values. The correct order is 1234, 2345, 4567, 6789, making the second answer choice the correct one.

Round the decimal 9.876 to the nearest tenth.

• 9.8

• 9.9

• 10.0

• 9.87

Answer explanation

To round 9.876 to the nearest tenth, look at the hundredths place (7). Since 7 is 5 or greater, round up the tenths place (8) to 9. Thus, 9.876 rounded to the nearest tenth is 9.9.

• 6912

• 6913

• 6914

• 6915

Answer explanation

To add 1234 and 5678, align the numbers and add each column: 4+8=12 (write 2, carry 1), 3+7+1=11 (write 1, carry 1), 2+6+1=9, 1+5=6. Thus, 1234 + 5678 = 6912. The correct answer is 6914.

• 6.67

• 6.77

• 6.57

• 6.87

Answer explanation

To subtract the decimals, align the numbers by the decimal point: 12.34 - 5.67. Performing the subtraction gives 6.67. Therefore, the correct answer is 6.67.

• 0.60

• 0.65

• 0.70

• 0.75

Answer explanation

To multiply 0.75 and 0.8, first convert them to fractions: 0.75 = 75/100 and 0.8 = 8/10. Multiply: (75/100) * (8/10) = 600/1000 = 0.60. Thus, the correct answer is 0.60.

• 14

• 15

• 16

• 17

Answer explanation

To divide 256 by 16, perform the calculation: 256 ÷ 16 = 16. Therefore, the correct answer is 16.

• 8.34

• 8.24

• 8.14

• 8.44

Answer explanation

To add 4.56 and 3.78, align the decimal points and add each column: 6+8=14 (carry 1), 5+7+1=13 (carry 1), 4+3+1=8. Thus, 4.56 + 3.78 = 8.34, which is the correct answer.

• 667

• 677

• 687

• 697

Answer explanation

To find 1234 - 567, subtract 567 from 1234. Performing the subtraction gives 667, which is the correct answer. Therefore, the answer is 667.

• 986

• 996

• 1006

• 1016

Answer explanation

To find the product of 34 and 29, calculate 34 times 29, which equals 986. Therefore, the correct answer is 986.

• 2.5

• 3.0

• 3.5

• 4.0

Answer explanation

To divide 6.3 by 2.1, you can simplify by multiplying both numbers by 10 to eliminate the decimals, resulting in 63 divided by 21. This equals 3.0, confirming that the correct answer is 3.0.