Numbers in Maths - Grade 4 Questions With Answers

Maths choice questions on numbers for grade 4 are presented along with step-by-step solutions and explanations.

Questions and Solutions

  1. Digit Count: How many digits are in the number \(1,002,004\)?
    1. \(3\)
    2. \(5\)
    3. \(6\)
    4. \(7\)
    View Step-by-Step Solution

    Problem: Count the number of digits in \(1,002,004\).

    Explanation: Counting each individual digit (1, 0, 0, 2, 0, 0, 4) gives a total of 7 digits.

    Therefore, the correct option is D.

  2. Rounding: What is 109,786,865 rounded to the nearest ten million?
    1. \(110,000,000\)
    2. \(100,000,000\)
    3. \(111,000,000\)
    4. \(109,770,000\)
    View Step-by-Step Solution

    Problem: Round \(109,786,865\) to the nearest ten million.

    Explanation: The ten-million digit is 0 (in 109...). The digit to its right is 9. Since 9 is greater than or equal to 5, we round up the ten-million digit by 1, resulting in \(110,000,000\).

    Therefore, the correct option is A.

  3. Standard Form: Write Two hundred one million, five hundred six thousand, twelve in standard form.
    1. \(210,560,012\)
    2. \(201,560,120\)
    3. \(201,506,012\)
    4. \(201,506,120\)
    View Step-by-Step Solution

    Problem: Convert words to standard numeric form.

    Explanation:

    • Millions period: \(201\)
    • Thousands period: \(506\) (five hundred six thousand)
    • Units period: \(012\) (twelve, with zero in the hundreds place)
    Combined form is \(201,506,012\).

    Therefore, the correct option is C.

  4. Ordering Numbers: Order from greatest to least the numbers:

    9,239,999 | 9,932,999 | 99,111,222 | 9,329,999

    1. \(9,239,999 \mid 9,932,999 \mid 99,111,222 \mid 9,329,999\)
    2. \(99,111,222 \mid 9,932,999 \mid 9,329,999 \mid 9,239,999\)
    3. \(99,111,222 \mid 9,932,999 \mid 9,239,999 \mid 9,329,999\)
    4. \(9,239,999 \mid 99,111,222 \mid 9,329,999 \mid 9,932,999\)
    View Step-by-Step Solution

    Problem: Order from greatest to least.

    Explanation: Comparing values from largest to smallest:

    • \(99,111,222\) (greatest, 8 digits)
    • \(9,932,999\)
    • \(9,329,999\)
    • \(9,239,999\) (least)

    Therefore, the correct option is B.

  5. Ordering Decimals: Order from least to greatest the numbers: 0.99, 0.099, 9.9, 0.9.
    1. \(0.99, 0.099, 9.9, 0.9\)
    2. \(0.99, 9.9, 0.099, 0.9\)
    3. \(9.9, 0.9, 0.99, 0.099\)
    4. \(0.099, 0.9, 0.99, 9.9\)
    View Step-by-Step Solution

    Problem: Order decimals from least to greatest: \(0.99, 0.099, 9.9, 0.9\).

    Explanation: Align decimal places by adding trailing zeros: \(0.990, 0.099, 9.900, 0.900\). Sorting from smallest to largest gives \(0.099, 0.9, 0.99, 9.9\).

    Therefore, the correct option is D.

  6. Rounding: Round 312.92 to the nearest whole number.
    1. \(313\)
    2. \(312\)
    3. \(312.9\)
    4. \(300\)
    View Step-by-Step Solution

    Problem: Round \(312.92\) to the nearest whole number.

    Explanation: The tenths digit is 9. Since \(9 \ge 5\), round up the whole number part from 312 to 313.

    Therefore, the correct option is A.

  7. Word Form: Write 82,145,987 in word form.
    1. eighty-two million, one hundred forty-five thousand, nine hundred eighty-seven
    2. eighty-two, one hundred forty-five, nine eight seven
    3. eighty-two million, one hundred forty-five thousand, nine hundred eight-seven
    4. eighty-two million, one hundred forty-five, nine hundred eighty seven
    View Step-by-Step Solution

    Problem: Write \(82,145,987\) in words.

    Explanation: 82 million is "eighty-two million", 145 thousand is "one hundred forty-five thousand", and 987 is "nine hundred eighty-seven".

    Therefore, the correct option is A.

  8. Rounding: Which one of these numbers rounds to 100,000?
    1. \(99,999\)
    2. \(94,789\)
    3. \(150,000\)
    4. \(90,000\)
    View Step-by-Step Solution

    Problem: Find which number rounds to \(100,000\).

    Explanation: \(99,999\) has a 9 in the thousands place, so it rounds up to \(100,000\) when rounded to the nearest hundred thousand.

    Therefore, the correct option is A.

  9. Rounding Place Value: How is 23,456 rounded to obtain 23,500?
    1. to the nearest ten
    2. to the nearest hundred
    3. to the nearest thousand
    4. to the nearest ten thousand
    View Step-by-Step Solution

    Problem: Identify the place value used to round \(23,456\) to \(23,500\).

    Explanation: The digit in the hundreds place is 4, and the digit to its right (tens) is 5, causing it to round up to 500. This is rounding to the nearest hundred.

    Therefore, the correct option is B.

  10. Place Value Comparison: If you switch the positions of the digits 3 and 5 in the number 3256, which statement is correct?
    1. the number does not change
    2. the number increases
    3. the number decreases
    4. the number has more digits
    View Step-by-Step Solution

    Problem: Switch 3 and 5 in \(3,256\).

    Explanation: The original number is \(3,256\). Swapping 3 and 5 gives \(5,236\). Since \(5,236 > 3,256\), the number increases.

    Therefore, the correct option is B.

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