🧮 Multi-Digit Multiplication — Multiplying Two-Digit by Two-Digit
Explore the Deep Twilight with Wanda!
Read the Passage First!
🔤 Words to Know
Algorithm — A step-by-step method for solving a math problem.
Regroup — To carry or borrow when a column totals 10 or more.
Wanda faced a new challenge: 23 x 14. "Two-digit times two-digit! How do I do this?"
"Use the area model," said Scuba Bob. "Break each number: 23 = 20 + 3, and 14 = 10 + 4."
"Now multiply each pair: 20x10=200, 20x4=80, 3x10=30, 3x4=12."
"Add the partial products: 200 + 80 + 30 + 12 = 322!"
Wanda also learned the stacked method: "Write 23 on top, 14 on bottom. First multiply 23 x 4 = 92. Then 23 x 10 = 230. Add: 92 + 230 = 322!"
"Both methods give the same answer. Use whichever makes more sense to you," said Scuba Bob.
🧠 Answer the Questions
Read carefully!
What is this quiz about?
Who helped explore?
What is algorithm?
48 x 6 = ?
156 / 4 = ?
3/8 + 2/8 = ?
Which is greater: 0.7 or 0.65?
What is the area of a 12 x 8 rectangle?
Round 3,847 to the nearest hundred.
What angle is exactly 90 degrees?
7/10 as a decimal?
What is 5 x (3 + 2)?
Where does the story take place?