Are the decimals 0.4 and 0.40 equal? Explain.

2 answers:

6 0

Yes they are the same value because the 4 is in the tenths place in bother decimals. 0.4 is just a shortened way of writing 0.40.

abruzzese [7]4 years ago

4 0

They are both equal since 0.4 is just 0.40 without a 0 because you can add as many 0 at the end of a decimal but it still won't matter. For example 0.5000 would just be 0.5 because those 0 don't mater. if the 0 is in the middle of a decimal like 0.709 than the 0 between the 7 and 9 would matter because there is a number after it

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Simplify this expression. 20.25 – 9 + 11 о 1 4 0 18.75 0 21? 0 40.75

Greeley [361]

Answer:

$21\frac{3}{4}$

Step-by-step explanation:

Step 1: Add the numbers.

20.25 can also be expressed as $20\frac{1}{4}$ , because $\frac{2025}{100}$ = $\frac{81}{4}$ = $20\frac{1}{4}$ . So if we add $20\frac{1}{4}$ and 11, we would get $31\frac{1}{4}$

Step 2: Solve

$31\frac{1}{4} -9\frac{1}{2}$

Subtract the whole numbers

$31-9=21$

Combine the fractions

This means addition. Also, since our denominators are not the same value, we have to find the LCM (Least Common Denominator): What do 2 and 4 have in common that they can divide themselves by? 4. We know this because 2 divided by 4 is 2, and 4 divided by 4 is 1, so they can both divide themselves by 4.

$\frac{5}{4}-\frac{1}{2}$