# National-scale environmental issue

### number & operations

Single-Digit Numbers

### NUMBER & OPERATIONS

2-Digit Numbers

problem 7: Who has the cleanest car?

problem 22: Apple vs. Hamburger: Which takes more water to produce?

problem 24: How can I save water?

#### <,>&= SYMBOLS

problem 7: Who has the cleanest car?

problem 43: Do we use lots of energy?

#### multiplication & division

problem 23: How much water do I use?

### data analysis

#### bar graphs

1-Digit Numbers

problem 12: What makes harmful gas?

2-Digit Numbers

problem 7: Who has the cleanest car?

#### Circle graphs

problem 42: Our na energy sources (number comparison)

problem 43: Do we use lots of energy?

### Number & operations

2-Digit Numbers

problem 7: Who has the cleanest car?

problem 22: Apple vs. Hamburger: Which takes more water to produce?

problem 24: How can I save water?

3-Digit Numbers

problem 14: How big is our harmful gas? (using bar graphs)

problem 22: Apple vs. Hamburger: Which takes more water to produce?

problem 46: What state produces the most coal?

problem 53: Wind race U.S. vs. China

#### NUMBER COMPARISON

problem 18: How is our water used?

problem 46: What state produces the most coal?

problem 53: Wind race U.S. vs. China

#### ROUNDING

problem 46: What state produces the most coal?

#### Ordinal numbers

problem 14: How big is our harmful gas? (using bar graphs)

#### place value

problem 21: How long is our Ohio River?

problem 46: What state produces the most coal?

#### MULTIPLICATION & DIVISION

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

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

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

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

## data analysis

#### BAR GRAPHs

1-Digit Numbers

problem 12: What makes harmful gas?

2-Digit Numbers

problem 7: Who has the cleanest car?

3-digit numbers

problem 14: How big is our harmful gas? (using ordinal numbers)

problem 14: How big is our harmful gas? (using addition & subtraction)

#### Circle graphs

problem 30: What makes our trash?

problem 42: Our nation’s energy sources (number comparison)

problem 42: Our nation’s energy sources (converting percents to fractions)

problem 49: Solar energy in our country

### number & operations

3-Digit Numbers

problem 14: How big is our harmful gas? (using bar graphs)

problem 22: Apple vs. Hamburger: Which takes more water to produce?

problem 53: Wind race U.S. vs. China

4-Digit Numbers

problem 1: Our path to cleaner air

problem 41: The history of our energy

6-Digit Numbers

problem 46: What state produces the most coal?

Decimal numbers

problem 48: Our electricity price–high or low?

problem 49: Solar energy in our country

#### Number Comparison

problem 46: What state produces the most coal?

problem 53: Wind race U.S. vs. China

Decimal numbers

problem 48: Our electricity price–high or low?

#### Ordinal numbers

problem 14: How big is our harmful gas? (using bar graphs)

#### ROUNDING

problem 46: What state produces the most coal?

Decimal numbers

problem 49: Solar energy in our country

#### PLACE VALUE

problem 46: What state produces the most coal?

#### <,>&= SYMBOLS

problem 48: Our electricity price–high or low?

#### PERCENTAGEs, FRACTIONs & DECIMALs

problem 38: How much bottles is recycled? (converting percentages to fractions & decimals)

#### MULTIPLICATION & DIVISION

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?  (2 digits x 1 digit)

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

Multiples of 10

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

### PROBABILITY AND STATISTICS

#### MEAN, Median, MODE &  range

problem 19: Do you think we use lots of water?

### data analysis

#### LINE GRAPHs

Numbers up to 250

problem 27 : How much trash does our country produce?

#### BAR GRAPHs

problem 7: Who has the cleanest car?

problem 12: What makes harmful gas?

problem 14: How big is our harmful gas? (using ordinal numbers)

problem 14: How big is our harmful gas? (using addition & subtraction)

problem 18: How is our water used?

problem 19: Do you think we use lots of water?

problem 35: why is it better to recycle aluminum cans?

problem 38: How much bottles is recycled?

problem 46: What state produces the most coal?

Double bar graphs

problem 24: How can I save water?

#### Circle graphs

problem 18: How is our water used?

problem 43: Do we use lots of energy?

problem 30: What makes our trash?

problem 42: Our nation’s energy sources (converting percents to fractions)

problem 49: Solar energy in our country

### number & operations

3-Digit Numbers

problem 22: Apple vs. Hamburger: Which takes more water to produce?

problem 53: Wind race U.S. vs. China

4-Digit Numbers

problem 1: Our path to cleaner air

problem 41: The history of our energy

Decimal Numbers

problem 49: Solar energy in our country

problem 48: Our electricity price–high or low?

#### NUMBER COMPARISON

problem 46: What state produces the most coal?

problem 53: Wind race U.S. vs. China

Decimal number

problem 48: Our electricity price–high or low?

#### ROUNDING

Decimal numbers

problem 49: Solar energy in our country

#### PLACE VALUE

problem 46: What state produces the most coal?

#### Symbols

problem 48: Our electricity price–high or low?

#### PERCENTAGEs, FRACTIONs & DECIMALs

problem 30: What makes our trash? (converting percentages to fractions & decimals)

problem 38: How much bottles is recycled? (converting percentages to fractions & decimals)

#### MULTIPLICATION & DIVISION

problem 7: Who has the cleanest car?

problem 22: Apple vs. hamburger – which takes more water to produce?  (2 digits x 1 digit)

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

Multiples of 10

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

### PROBABILITY AND STATISTICS

#### MEAN, Median, MODE &  range

problem 19: Do you think we use lots of water?

### data analysis

#### LINE GRAPHs

Numbers up to 250

problem 27 : How much trash does our country produce?

#### BAR GRAPHs

2-Digit Numbers

problem 7: Who has the cleanest car?

problem 35: why is it better to recycle aluminum cans?

problem 38: How much bottles is recycled?

3-Digit Numbers

problem 18: How is our water used?

problem 46: What state produces the most coal?

4-Digit Numbers

problem 19: Do you think we use lots of water?

Double bar graphs

problem 24: How can I save water?

#### Circle GRAPHs

problem 18: How is our water used?

problem 30: What makes our trash?

problem 49: Solar energy in our country