### SECOND GRADE

problem 2: How much water do I use? (1 digit x 1 digit)

### THIRD GRADE

problem 7: Who has the cleanest car? (half & double)

problem 22: Apple vs. hamburger – which takes more water to produce?

problem 2: How much water do I use? (1 digit x 1 digit)

problem 23: How much water do I use? (2 digits x 1 digit)

problem 32: How much trash ends up in landfill?

### FOURTH GRADE

problem 7: Who has the cleanest car? (half & double)

problem 7: Who has the cleanest car?

problem 22: Apple vs. hamburger – which takes more water to produce?

problem 23: How much water do I use? (2 digits x 1 digit)

problem 32: How much trash ends up in landfill?

problem 50: Solar power on Swonder

Multiples of 10

problem 20: Water tanks in Evansville

problem 32: How much trash ends up in landfill?

problem 55: How much energy & money do new light bulbs save?

Decimal numbers

problem 20: Water tanks in Evansville

### FIFTH GRADE

problem 7: Who has the cleanest car?

problem 22: Apple vs. hamburger – which takes more water to produce?

problem 23: How much water do I use? (2 digits x 1 digit)

problem 32: How much trash ends up in landfill?

problem 50: Solar power on Swonder

Multiples of 10

problem 20: Water tanks in Evansville

problem 32: How much trash ends up in landfill?

problem 55: How much energy & money do new light bulbs save?

Decimal numbers