A toy baseball and bat cost $1.50 together. The bat costs $1.00 more than the baseball. How much does the baseball cost?

Write an equation system based on the problem

x stands for the bat, and y stands for the baseball

" A toy baseball and bat cost $1.50 together" could be written as:

∴ x + y = 1.5

" The bat costs $1.00 more than the baseball" could be written as:

∴ x = y + 1

Solve the equation system by substitution method. Plug x as y + 1 into the first equation

x + y = 1.5

y + 1 + y = 1.5

2y + 1 = 1.5

2y = 1.5 - 1

2y = 0.5

y = 0.5/2

y = 0.25

The baseball costs $0.25