Page 9 - TG_G1_CH6_CHRIS

6 - 1 1 More and 10 More
WARM-UP

On Level

Standard
1.NBT.C.5. Given a two−digit number, Time: 10 minutes
mentally find 10 more or 10 less than
the number without having to count; WHOLE CLASS
explain the reasoning used. Material: 100 chart
Instruction:Give a copy of a 100 chart to each group of children (small groups).
Objective Say: start at 35 and then move one step down. Color the number you will land on.
Which number is 10 more than 35 ?
Find 1 and 10 more than a given 10 more than 35 is 45
two-digit number mentally using a 35
hundred chart. 45

Essential Question

How can I find 1 more and 10 more?
To find 1 more using 100 chart move Reteach
one step to the right and to find 10
more move one step down.
Time: 10 minutes
Ready to Go WHOLE CLASS

Say: The last few lessons you studied Material: Unifix cubes and the following table
numbers up to 120, and reading Instruction: Say: Add a cube to get one more and add a
writing and comparing these number, tower to get 10 more.
Today you will see how you can Write the number of cubes in the table and then complete it.
Number
count on ones or tens to these One More
numbers. Ten More

Number 20 42 19
One More 21 43 20
Ten More 30 52 29

Enrich

Time: 10 minutes
INDIVIDUAL

Material: dimes and pennies
Instruction: Give children 3 cents. Then give them one dime. Ask: How much money
do you have? Give children 1 more cent. Ask: How much money do you have
now?
Then give children another dime.
Ask: How much money do you have now?
3 + 10 = 13 cents ; 13 + 1 = 14 cents 14 + 10 = 24 cents

400