Cogito
Grade 1 Math · Chapter 10 · Lesson 10
Year-End Fluency Festival
Look back at everything you learned this year.
11 problems · about 14 minutes · 1.OA.C.6, 1.NBT.B.2, 1.NBT.C.5
What this lesson teaches
The child practises mixed facts within 10 and 20 alongside place value, keeping the year’s fluency alive.
- You can see numbers without counting them.
- You can make ten and take from ten.
- You can build and compare numbers to 120.
- That is a whole year of maths.
Warm Up
Straightforward practice. Get the method working first.
5 problems8 + 5 = ?
Answer 13
Why 8 + 5 = 10 + 3 = 13.
14 − 9 = ?
Answer 5
Why 14 − 9 = 5.
7 + 3 = ?
Answer 10
Why A partner to ten.
9 + 6 = ?
Answer 15
Why 9 needs 1 to make ten.
13 − 8 = ?
Answer 5
Why Take from the ten.
Build It Up
The same ideas with more to keep track of.
3 problems6 + 6 = ?
Answer 12
Why A double you know.
How many tens are in 58?
Answer 5
Why The first digit.
Ten more than 76 is?
Answer 86
Why The 6 stays.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
3 problems43 + 25 = ?
Answer 68
Why Tens with tens.
The Whole Year: 9 red apples and 7 green ones. How many in all?
Answer 16 apples
Why 9 + 7 = 10 + 6 = 16.
Sharing Out: 15 stickers. Ana takes 8. How many are left?
Answer 7 stickers
Why 15 − 8 = 7.