Adding & Subtracting Decimals
The most important step before adding or subtracting decimals is making sure to line up these punctuation marks vertically.
What are decimal points?
Billy agrees to eat 15 worms in 15 days in order to win a $50 bet to buy this vehicle.
What is a minibike?
To make most regular nouns like "cat," "book," or "dog" plural, you simply add this letter to the end.
What is the letter S?
Sailing for Spain in 1492, this Italian explorer set out to reach Asia by sailing west across the Atlantic Ocean.
Who is Christopher Columbus?
This microscopic, green, plant-like organism grows quickly in lakes and ponds when exposed to sunlight and extra nutrients.
What is algae?
The sum of $3.50 + $2.25.
What is $5.75?
Billy uses condiments like ketchup, mustard, horseradish, and melted cheese to help mask this awful quality of the worms.
What is the taste (or texture)?
The correct plural form of the word "child."
What are children?
Long before Columbus, this Venetian merchant traveled the Silk Road to China and wrote a book that inspired European interest in Asia.
Who is Marco Polo?
Farmers and gardeners spread this nutrient-rich substance on soil to help crops grow, but rainwater can wash it into nearby ponds and rivers.
What is fertilizer?
If you have 10.5 inches of string and cut off 4.2 inches, this is how many inches you have left.
What is 6.3 inches?
These two boys make the bet with Billy and spend the rest of the book trying to trick or stop him from winning.
Who are Alan and Joe?
When a noun ends in a consonant + Y (like "puppy" or "city"), you drop the Y and add these three letters.
What is -ies?
This Spanish queen, along with her husband King Ferdinand, agreed to sponsor and pay for Christopher Columbus's famous 1492 voyage across the Atlantic.
Who is Queen Isabella?
When excess fertilizer washes into a body of water, it causes a rapid explosion of plant growth on the water's surface called an algae bloom, which blocks this critical necessity for underwater plants.
What is sunlight?
When solving $8.00 - $3.45, you must do this across zero to subtract 5 cents from 0 cents.
What is regrouping (or borrowing)?
To make Billy think he is going to die after eating worms, Alan and Joe write a fake letter from one of these professionals.
What is a doctor?
Nouns like "deer," "sheep," and "fish" belong to a special group because their singular and plural forms look like this.
What is the same (or unchanged)?
Famous for having six wives, this English king broke away from the Catholic Church to establish the Church of England so he could remarry.
Who is King Henry VIII?
After an algae bloom dies, decomposers like bacteria eat the dead algae and use up most of this dissolved gas in the water, causing fish to suffocate.
What is oxygen?
The total perimeter of a triangle with sides measuring 4.25 cm, 3.8 cm, and 5.15 cm.
What is 13.2 cm?
To keep Billy from finding and eating his 15th worm before the deadline, Alan and Joe lure him into a building and lock him inside this underground water storage tank.
What is a cistern?
The correct plural spelling for the word "cactus."
What are cacti (or cactuses)?
In 1517, this German monk started the Protestant Reformation by nailing his 95 Theses to the door of a church, criticizing Catholic Church practices.
Who is Martin Luther?
When chemical pollution or fertilizer washes off farms, lawns, and streets into waterways during heavy rain, it is known by this term.
What is agricultural runoff (or surface runoff)?