betragen
to amount to
To make up a specific sum, value, or number.
Die Kosten für die Reparatur betragen 250 Euro.
The cost of the repair amounts to 250 euros.

to amount to / to behave
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to amount to
To make up a specific sum, value, or number.
Die Kosten für die Reparatur betragen 250 Euro.
The cost of the repair amounts to 250 euros.

'Betragen' (to amount to / to behave) is an inseparable verb. The prefix 'be-' stays firmly attached to the verb stem 'tragen' in all tenses and sentence positions.
Die Rechnung betrug mehr als erwartet.
The bill amounted to more than expected.
The two meanings are easy to distinguish: without the reflexive pronoun 'sich', it is about a number or value. With 'sich', it is always about a person's behavior.
Der Schaden beträgt 500 Euro.
The damage amounts to 500 euros.
In this meaning, the subject of the sentence is always an impersonal quantity such as 'die Kosten' (the costs), 'der Preis' (the price), 'die Summe' (the sum), 'die Distanz' (the distance), or 'die Temperatur' (the temperature).
Die Entfernung zum nächsten Bahnhof beträgt zwei Kilometer.
The distance to the nearest train station is two kilometers.
In the meaning 'sich verhalten' (to behave), the verb must always be used with a reflexive pronoun in the accusative. The behavior is often described more precisely with an adverb.
Die Kinder haben sich im Museum vorbildlich betragen.
The children behaved exemplaryly in the museum.
to do / make
'machen' and 'betragen' can both express how much something comes to in total or what value something has. Here, 'machen' sounds simpler and more colloquial, especially in calculations: 'Zwei plus drei macht fünf.' (Two plus three makes five.) 'betragen' is more precise and factual. It is often used with prices, costs, distances, numbers, or official information. The words can be confused because both can be used with numbers. A practical rule is: in casual calculations, 'machen' fits; in reports, invoices, or formal information, 'betragen' sounds more natural.

Die Kosten für die Reparatur betragen 180 Euro.
The cost of the repair amounts to 180 euros.
Drei Euro und zwei Euro machen zusammen fünf Euro.
Three euros and two euros make five euros altogether.