1. What is the total value of digit one in the number 912345?
A. Ten thousand
B. Hundred thousand
Place value of digit 1 = ten thousands
Total value of digit 1 = ten thousand x 1
= 10, 000 (ten thousand)
Answer is therefore A
2. What is this number rounded off to the nearest hundredths? 2345.6789
Digit 7 represents the place value of hundredths
To round off to the nearest hundredths, we check the digit that represents thousandths and if it is equal to or greater than 5. If we find that it is greater, we increase the digit that represents hundredths by one digit, else, the hundredths digit remain unchanged.
From the table above, we can deduce that digit 8 represents thousandths and 8 is greater than 5. Therefore, it will affect digit 7 which will increase by one.
Our answer will be 2345.68
The correct answer is therefore C.
3. What is the total value of digit 4 obtained after the multiplication of 5.078 x 2.64?
B. Four tenths
D. Four hundredths
The first step is to find the product of 5.078 by 2.64 = 13.4059
The place value of 4 is tenths
The total value of 4 is four tenths
Therefore, the correct answer is B
4. What is 5 892 769 rounded off to the nearest thousands?
A. 5 893 000
B. 5 890 000
C. 5 900 000
D. 5 892 800
Digit 2 represents place value of thousands
If we look at a smaller value (hundreds), 7 is bigger than 5 therefore affecting 2 by increasing it by 1.
The answer will be 5 893 000
The answer is therefore A
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