An ice-covered lighthouse on the shore of Lake Michigan
Heaviest Snowfall
Mount Baker, in Washington State, got a record 95 feet of snow during the winter of 1998-1999. Santis Mountain, in the Swiss Alps, gets half that much every winter.
How much snow does Santis Mountain usually get? Write an equation with a variable and solve.
Hottest Day
Death Valley, a desert in eastern California, is one of the world’s hottest places in summer. In July 1913, the temperature reached 134° Fahrenheit.
On a typical July day, Death Valley reaches 117°F. How much hotter is the record-breaking temperature compared with a typical day?
List the values you know and the unknown value you are trying to find. Then solve.
Soggiest Storm
In 1966, the small French island of Réunion, off the east coast of Madagascar, received record-breaking rain. The tape diagram below shows the total amount of rain received in 24 hours, broken into two 12-hour time periods.
Solve for f.
Longest Weather Report
In 2014, weather reporter Al Roker set out to get the Guinness World Record for the longest weather report. He succeeded with a 34-hour report! A typical workday is 8 hours. Circle the variable below. Then solve for the variable. What does the variable in this problem represent?
8 + n = 34
Heaviest Hailstone
The heaviest hailstone ever recorded was a whopping 2.25 pounds! It crashed to the ground
in Bangladesh on April 14, 1986.
A standard-size ice cube weighs around 0.04 pounds. Does the equation below tell you how many times heavier the hailstone was than the ice cube? Why or why not?
2.25 pounds × 0.04 pounds = ?
Words to Know
VARIABLE: An unknown value. In equations, unknown values are indicated by a letter.
EQUATION: A number sentence that includes an equal sign. The value of the numbers on each side of the equal sign are the same.
OPERATOR: A symbol (+, −, ×, ÷) that can be used to calculate numbers or solve equations.
TAPE DIAGRAM: A visual model that represents a relationship between two or more quantities.