Week 06 · Two steps and patterns
Thursday
The lantern count
// Solve, estimate and look for patterns
⏱ about 15 min
Thursday: The lantern count
Chris the Coyote settles by the campfire.
"One evening, Oliver hung lanterns along the trail," he says.
"He hung 6 rows with 5 lanterns in each row."
"Then the wind blew out 4 of them."
"Oliver did not fuss. He counted what still glowed."
"Then he checked his answer, just as a wise owl should."
Story: How many still glow?
Step 1: 6 rows of 5 is 6 × 5 = 30 lanterns.
Step 2: 4 blew out. 30 - 4 = 26.
Let g be the glowing lanterns. 6 × 5 - 4 = g, so g = 26.
QUESTIONS ABOUT THE STORY
- Read the question.
- Tap your answer.
How many lanterns were in each row?Oliver hung 6 rows of 5 lanterns. How many lanterns?
There were 30 lanterns, and 4 blew out. How many still glow?
More trail problems
SOLVE THE STORY
- Read the question.
- Tap your answer.
Hazel has 45 ribbons. She keeps 5 and shares the rest among 8 friends. How many each?
Donnie sees 3 rows of 9 ferns, then 2 more rows of 9. How many ferns?
Bennie has 100 seeds. He plants 8 rows of 7. How many seeds are left?Riley finds 9 red stones and 7 gray stones each day for 4 days. How many stones?
IS IT REASONABLE?
- Read the question.
- Tap your answer.
Hazel says 233 + 158 = 391. Is that reasonable?
Riley says 77 - 34 = 111. Is that reasonable?
Lucy says 486 - 211 = 697. Is that reasonable?
Do the steps in order. Multiply before you add or subtract.
| Sentence | True or false? |
|---|---|
| 6 × 5 - 4 = 26 | ? |
| 3 × 9 + 2 × 9 = 5 × 9 | ? |
| 100 - 8 × 7 = 54 | ? |
| (9 + 7) × 4 = 64 | ? |
WHY THIS EXERCISE100 - 8 × 7 is 44, because 8 × 7 = 56.
Try it
Set out 4 rows of 3 cups or blocks.
Take 2 away.
Write an equation with a letter, then solve it.
Take 2 away.
Write an equation with a letter, then solve it.
Draw Oliver's lanterns. Color the ones that still glow.
A glowing story! Tomorrow Freddy has a review game.