an aquarium at a pet store has 18 black neon tetra fish in it. A customer buys 12 black neon tetra fish at the same time the store clerk adds 7 more black neon fish to the tank.How many black neon tetra fish are in the aquarium now?
18-12+7 6 + 7 13 Write an equation. Subtract first- the customer buys 12 black neon tetra fish which means subtraction addition- the store clerk puts in 7 more black neon tetra fish which means your gonna add 7
