The official Casa rate for a taxi to Anápolis is R$45 plus R$5 per hour for any time over two hours. The other option is to take the bus.

The Anápolis bus leaves Abadiânia from the Rodoviaria (bus station) at the times listed below, but the best place to pick it up is at the bus shelter on the Casa side of the main road, just on the way out of town, where it stops about 5 minutes later. The trip to Anápolis takes about 45 minutes.
Where you get off in Anápolis depends on what you wish to do there. If you are planning to use the Internet, the best place to get off is the stop at the end of Avenida São Francisco (ask the bus driver) (no. 4 on map). For the town centre, you can hop off at either Avenida Brasil (no. 12 on map) or the large concrete and corrugated iron Rodoviaria at the end of Avenida Brasil. If you are planning to take an onward bus to a further destination, then get off at the Rodoviaria. You can pick up the return bus to Abadiânia from the large Rodoviaria, bottom floor, platform 1, at the times listed below. Handier is the bus stop on Avenida Brasil (no. 15 on map), next to the Prefeitura (town hall), where the bus stops about 10 minutes later. Note that the Abadiânia bus does not leave from the yellow Rodoviaria Urbano in the town centre.

The bus costs R$2.55 each way and you should buy a ticket before you get on the bus. There is usually a stall or a booth around the bus stops where you can buy a ticket (bilhete). To get the driver to stop at a bus stop, you need to ring the bell, or pull the cord.