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Number Trail Grade 1 / Week 03 / Tuesday
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Week 03 · Subtract within 10

Tuesday

Count back
// Take away, count back, think addition
⏱ about 15 min

Tuesday: Count back

Donnie walks back along the trail.

"Each step back is one less," says Donnie.

Bennie counts the steps out loud.

Learn it: count back

To subtract, you can count back.

Start at 8. Take away 3.

Hop back three times: 7, 6, 5.

You land on 5. So 8 - 3 = 5.

A number line with hops back from 8 to 5
HOP BACK
  • Read the question.
  • Tap your answer.
A number line from 0 to 10, with hops from 8 to 58 - 3 = ?
A number line from 0 to 10, with hops from 10 to 610 - 4 = ?
A number line from 0 to 10, with hops from 7 to 57 - 2 = ?
A number line from 0 to 10, with hops from 9 to 69 - 3 = ?

Count back in steps

Count back from 10 by ones.

Say each number as you step.

COUNT BACK FROM 10
  • Start at 10.
  • Count back 3.
1Start
21 back
32 back
43 back
ONE LESS
  • Read the question.
  • Tap your answer.
What number comes just before 7?
What number comes just before 10?
6 - 1 = ?
4 - 1 = ?
STORY PROBLEMS
  • Read the question.
  • Tap your answer.
Donnie sees 9 birds. 2 birds fly away. How many stay?
There are 10 acorns. Samantha takes 3. How many are left?
Lucy has 7 spots. She covers 4. How many can you see?
Number sentenceTrue or false?
10 - 4 = 6?
8 - 3 = 4?
7 - 2 = 5?
WHY THIS EXERCISE8 - 3 is 5. Hop back 7, 6, 5.
Try it
Line up 10 toys in a row.
Take away 1 toy at a time.
Count back as you go: 9, 8, 7!

Word Spot: from, give

Here are new sight words.

Look at each word. Say it. Spell it.

From: F-R-O-M.

Give: G-I-V-E.

FIND THE WORD
  • Listen to the word.
  • Tap it.
Find the word you hear.
Find the word you hear.
Find the word you hear.
Find the word you hear.
FILL THE GAP
  • Listen to the sentence.
  • Tap the missing word.
Rain falls ___ the clouds.
I will ___ you a turn.

Nice counting back! Tomorrow we think of adding.

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