Understand Tens Guided Instruction Count cubes. Make tens ... · Understand Tens Guided Instruction Show 20 Count cubes. Make tens, Color. Write how Step By Step many tens Explain
Post on 06-Oct-2020
14 Views
Preview:
Transcript
Explore Together
Understand Tens Guided Instruction
Show 20
Step By Step Count cubes. Make tens, Color. Write how
many tens Explain the directions at the top of the page
Have children follow the model by counting
out 20 cubes and making groups of 10. Ask
why 2 groups of cubes are colored. Ensure
that children make the connection between
the physical model and the picture.
2 tens Allow children time to complete
Problems 1-3. Watch to make sure they
Show 30. Show 40 Show 50. count, color, and record the number of tens,
not the number of cubes, on the lines.
Discuss the structure of the numbers 20, 30,
40,50, connecting each one to the number
of tens recorded. Make sure children
understand that the zero shows there are
3tens 4tens 5 tens only tens and no extra ones
Write the number 30 on the board and cover
the zero. Ask: IflI told you to show this number
of cubes, what would you do?Children
should see that without the zero, the Ana counts 3 tens. Micah counts 20 ones. Which is more?
number is read as 3 ones, not as 3 tens
Mathematical Discourse 3
Visual Model Mathematical Discourse Talk About It
Recognize rows of a hundreds chart 3 How could you see that 40 is more than Read the Talk About It question aloud
as tens 30 just by looking at thenumbers? Encourage children to justify their decision
Look for an understanding that the Materials For each child: Hundreds Ask Mathematical Discourse question 4to
digits 3 and 4 in 30 and 40 indicate a extend the idea of comparing tens Chart (Activity Sheet 19), crayons
number of tens. Since 4 is more than 3 Display a hundreds chart. Ask children Mathematical Discourse 4
4 tens or 40 is more than to find the row of squares showing 1- -10
3 tens or 30 Visual Model on their own charts and color it.
Demonstrate on the displayed chart, 4 How did you decide whether Ana or
Have children shade in the next row of Micah has more cubes? Ready
Mathematics PRACTICE AND PROBLEM SOLVING
ten with a different color. Ask how many Some children might suggest building
rows are shaded and how many squares each group of cubes and counting Assign Practice and Problem Solving
are shaded. Encourage children to them. Others may suggest thinking of pages 157- -158 after students have
justify their answers by counting, or by 3 tens as 30 ones and comparing completed this section
recognizing that the numbers on the 20 ones to 30 ones or thinking of 20 as
chart tell how many in all 2 tens and comparing 3tens to 2 tens.
Continue to have children shade in rows
and find totals. Discuss how each row is
like a ten they made with connecting
cubes
Point out that the numbers in the
rightmost column are the numbers you
say when you count by tens
113 Lesson 17 Understand Tens OCurriculum Associates, LLC Copying is not permitted
top related