Question

order these numbers from least to greatest. 4.039, 4.39, 4.5, 4.3972

Explanation:

Step1: Compare ones place

All numbers have 4 in ones place, move to tenths.

Step2: Compare tenths place

$4.039$ has 0 (smallest), others have 3 or 5. $4.5$ has 5 (largest so far).

Step3: Compare hundredths place

$4.39$ and $4.3972$ have 9 in hundredths. Move to thousandths: $4.39 = 4.3900$ has 0, $4.3972$ has 7. So $4.39 < 4.3972$.

Step4: Arrange all numbers

Order from least to greatest: $4.039 < 4.39 < 4.3972 < 4.5$

Answer:

$4.039 < 4.39 < 4.3972 < 4.5$