Week 02 · Multiply: equal groups
Wednesday
Jumps and lengths
// Groups, arrays and stories
⏱ about 15 min
Wednesday: Jumps and lengths
Freddy the Frog wants to cross the meadow in big, even jumps.
"Each jump is 5 feet long," he says.
Chris and Bennie mark each landing spot with a stick.
"After 4 jumps, how far has Freddy gone?" asks Chris.
Bennie draws a number line in the dirt.
"Equal jumps are equal groups, too," he says.
Learn it: equal jumps on a number line
Each jump is 5 feet. Freddy makes 4 jumps.
Skip count by 5: 5, 10, 15, 20.
So 4 × 5 = 20. Freddy has gone 20 feet.
Lengths can be equal groups too.
Three ribbons are each 8 inches long. End to end, they make 3 × 8 = 24 inches.
SKIP COUNT ON THE NUMBER LINE
- Read the question.
- Tap your answer.
Skip count by 5 four times. Where do you land?
Skip count by 3 six times. Where do you land?
Skip count by 10 seven times. Where do you land?Which number comes next? 4, 8, 12, 16, ?
JUMP AND MEASURE STORIES
- Read the question.
- Tap your answer.
Freddy makes 4 jumps of 5 feet. How many feet in all?
Three ribbons are each 8 inches long. How long are they end to end?
Each pail holds 2 liters. How many liters do 6 pails hold?
Bennie walks 3 kilometers a day for 9 days. How many kilometers?
WHICH STORY FITS?
- Read the question.
- Tap your answer.
Which story fits 5 × 7?
Which story fits 3 × 6?Which number sentence fits 8 jumps of 2 feet?
ORDER THE PRODUCTS
- Find each product.
- Tap them from least to greatest.
11st
22nd
33rd
44th
Skip count to check each product.
| Sentence | True or false? |
|---|---|
| 4 × 5 = 20 | ? |
| 3 × 8 = 27 | ? |
| 7 × 10 = 70 | ? |
| 6 × 3 = 16 | ? |
WHY THIS EXERCISE3 × 8 = 24, and 6 × 3 = 18.
Try it
Lay a ruler or a strip of paper on the floor.
Jump along a hallway in small, even jumps.
Count your jumps.
If each jump is about 2 feet, how far did you go?
Jump along a hallway in small, even jumps.
Count your jumps.
If each jump is about 2 feet, how far did you go?
On paper, make a number line from 0 to 30. Show 6 jumps of 5.
Hop-hop hooray! Tomorrow Chris tells a story with groups.