Week 11 · Add and subtract tens
Wednesday
Add ones
// Bigger numbers, tens and ones
⏱ about 15 min
Wednesday: Add ones
Hazel has 42 crayons in a big jar.
She finds 5 more under her desk.
"Do the tens change?" asks Bennie.
Hazel thinks carefully.
Learn it: add the ones
42 is 4 tens and 2 ones.
Add 5 ones. 2 ones and 5 ones make 7 ones.
The tens stay the same.
So 42 plus 5 is 47.
ADD THE ONES
- Read the question.
- Tap your answer.
42 + 5 = ?
63 + 4 = ?
81 + 7 = ?25 + 3 = ?
Make a new ten
Now Hazel has 38 crayons. She gets 5 more.
8 ones and 5 ones make 13 ones.
That is a new ten and 3 ones.
So 38 plus 5 is 43.
MAKE A TEN
- Read the question.
- Tap your answer.
38 + 5 = ?
27 + 6 = ?
49 + 2 = ?
56 + 8 = ?
STORY PROBLEMS
- Read the question.
- Tap your answer.
Hazel has 34 pencils. Bennie gives her 7. How many now?
There are 19 shells. Hazel finds 4 more. How many?Do the ones make a new ten?
| Number sentence | True or false? |
|---|---|
| 42 + 5 = 47 | ? |
| 38 + 5 = 33 | ? |
| 66 + 4 = 70 | ? |
WHY THIS EXERCISE38 plus 5 makes a new ten. It is 43.
Try it
Show 28 with 2 piles of 10 and 8 ones.
Add 4 more ones.
Make a new pile of 10 if you can.
Count again. You have 32!
Add 4 more ones.
Make a new pile of 10 if you can.
Count again. You have 32!
Draw 4 tens and 6 ones. Then add 3 ones.
Word Spot: letters, mother
Here are new sight words.
Look at each word. Say it. Spell it.
Letters: L-E-T-T-E-R-S.
Mother: M-O-T-H-E-R.
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.
Cat has three ___.
The ___ bird feeds her chicks.
Great thinking! Tomorrow Chris tells a story about taking tens away.