Week 05 · Multiply bigger numbers
Friday
Freddy's product game
// Break numbers apart by place value
⏱ about 15 min
Friday: Freddy's product game
Freddy the Frog straightens his bow tie on a wide lily pad.
"Ribbit! Welcome to the product pond," he says with a grin.
"Every lily pad holds a puzzle from this week or the weeks before."
"Hop to a pad, solve the puzzle, and the next pad appears."
Bruce stretches. "I am ready for any challenge on this pond."
Bennie chuckles. "Remember to break numbers apart, one place at a time."
Freddy winks. "And take as long as you need. This pond is patient."
Game 1: Times tens and hundreds
FIND THE PRODUCT
- Read the question.
- Tap your answer.
9 × 40 = ?
5 × 600 = ?
3 × 8,000 = ?
50 × 60 = ?
Game 2: Bigger products
FIND THE PRODUCT
- Read the question.
- Tap your answer.
6 × 213 = ?
3 × 2,042 = ?
21 × 34 = ?
42 × 15 = ?
Game 3: Lily pads from earlier weeks
REMEMBER THESE?
- Read the question.
- Tap your answer.
Round 46,782 to the nearest thousand.
4,526 + 2,318 = ?
Bruce has 6 stones. Bennie has 4 times as many. How many does Bennie have?Which number is a factor of 36?
ORDER THE PRODUCTS
- Find each product.
- Put them from least to greatest.
11st
22nd
33rd
44th
Game 4: True or false?
Split by place value. Then add the partial products.
| Sentence | True or false? |
|---|---|
| 6 × 213 = 1,278 | ? |
| 21 × 34 = 724 | ? |
| 3 × 2,042 = 6,126 | ? |
| An area model for 42 × 15 has four boxes. | ? |
| 30 × 20 is a good estimate for 31 × 19. | ? |
WHY THIS EXERCISE21 × 34 is 714: 600 + 80 + 30 + 4.
Try it
Hop like Freddy 12 times, then rest.
Do that 3 more times. That is 4 × 12 hops.
How many hops in all? Check: 4 × 12 = 48.
Do that 3 more times. That is 4 × 12 hops.
How many hops in all? Check: 4 × 12 = 48.
Draw Freddy on a lily pad with your favorite product from this week.
Ribbit! You earned the product badge. Tomorrow is a Number Hunt.