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“Spotlight on Math”5th Grade
2014-2015
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Strategies for Multiplying Decimals
• Using place value mat for multiplying decimals with powers of 10.
• Using place value mat for multiplying decimals and whole numbers.
• Using place value mat for multiplying decimals and whole numbers (with regrouping)
• Using area model to multiply decimals and whole numbers.
• Explanation of tape models
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• Daily Math- Math 4 Today• Fluency Sprints-worksheets & oral• Lesson of the Day- GC and incls. guided, group and independent practice• Workstations • Interactive Notebooks
A Typical Day in 5th Grade MATH Class…
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Draw arrows on your place value mat to find the value of 0.04 x 10
0.04 x 10 = _____ tenthsDraw arrows on your place value mat to find the value of 0.004 x 10
0.004 x 10 = _____ hundredthsWhy does the digit move one place to the left?
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Show 3 groups of 2 tenths on your place value chart. How many tenths do you have in all?
3 x 0.2
Write the solution as a number sentence.
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3 x 0.3
Show 3 groups of 3 tenths on your place value chart. How many tenths do you have in all?
Write the solution as a number sentence.
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4 x 0.3
Show 4 groups of 3 tenths on your place value chart. How many tenths do you have in all?
Write the solution as a number sentence.
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Let’s solve using the area model.
2 x 0.43
Write 0.43 in expanded form
0.4 + 0.03
2 x 0.4 = 8 tenths
2 x 0.03 =6 hundredths2
0.8 + 0.06 = 0.86Write the products of each part here
Find the sum
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4 x 0.423
Let’s solve using the area model. Write 0.423 in
expanded form
4 x 0.4 = 16 tenths
4 x 0.02 =8 hundredths
4 x 0.003 =12 thousandths
0.4 + 0.02 + 0.003
4
Write the products of each part here
1.6 + 0.08 + 0.012 = 1.692
Find the sum (this time you have to regroup)
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Online Resources
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you for coming tonight!