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# Small Decimal Rounding to a Leading Digit

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Practice Small Decimal Rounding to a Leading Digit
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Estimate Decimal Products and Quotients Using Leading Digits

Have you ever had to figure out a dilemma involving money? Take a look at this situation.

### Vocabulary

Dividend
In a division problem, the dividend is the number or expression that is being divided.
Divisor
In a division problem, the divisor is the number or expression that is being divided into the dividend.
Estimate
To estimate is to find an approximate answer that is reasonable or makes sense given the problem.
The leading digit of a decimal number less than one is the first digit to the right of the decimal point that is not a zero.

### Guided Practice

Here is one for you to try on your own.

$120.0045 \div 6.237$

Solution

First, we take only the leading digits and rewrite this problem.

$120 \div 6$

Now our work is quite simple.

$120 \div 6 = 2$

Our estimate is $2$ .

### Explore More

Directions : Estimate each product or quotient by using leading digits.

1. $35.0012 \div 5.678$

2. $5.123 \times 11.0023$

3. $12.0034 \div 4.0012$

4. $12.123 \times 3.0045$

5. $48.0012 \div 12.098$

6. $13.012 \times 3.456$

7. $33.234 \div 11.125$

8. $12.098 \times 2.987$

9. $4.769 \times 8.997$

10. $14.98 \div 7.002$

11. $24.56087 \div 8.0012$

12. $45.098 \div 5.0098$

13. $9.0987 \times 9.0001$

14. $34.021 \times 4.012$

15. $21.0098 \times 2.0987$

16. $14.231 \times 3.7601$

17. $144.0056 \div 12.0112$