Download - Module 2 Lesson 2
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Module 2 Lesson 2Estimate multi-digit products by rounding
factors to a basic fact and using place value patterns.
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• 5.NBT.1 Recognize that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents in the place to its left.
5.NBT.2 Explain patterns in the number of zeros of the product when multiplying a number by powers of 10, and explain patterns in the placement of the decimal point when a decimal is multiplied or divided by a power of 10. Use whole-number exponents to denote power of 10.
Common CoreStandards
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Learning Targets
•I can Estimate multi-digit products by rounding factors to a basic fact and using place value patterns.
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Sprint A
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Sprint B
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Activate Knowledge
Write the multiplication sentence
31 × 10 =
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Activate Knowledge
Write the multiplication sentence
31 × 10 =
310 × 2 =
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Activate Knowledge
Write the multiplication sentence
31 × 10 =
310 × 2 =
310 × 20 =
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Activate Knowledge
Write the multiplication sentence
23 × 10 =
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Activate Knowledge
Write the multiplication sentence
23 × 10 =
230 × 4 =
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Activate Knowledge
Write the multiplication sentence
23 × 10 =
230 × 4 =
230 × 40 =
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Activate Knowledge
Write the multiplication sentence
32 × 10 =
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Activate Knowledge
Write the multiplication sentence
32 × 10 =
320 × 3 =
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Activate Knowledge
Write the multiplication sentence
32 × 10 =
320 × 3 =
320 × 30 =
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Activate Knowledge
Jonas practices guitar 1 hour a day for 2 years. Bradley practices the guitar 2 hours a day more than Jonas. How many more minutes does Bradley practice the guitar than Jonas over the course of 2 years?
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Learn
Estimate
23 x 18
Problem 1
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Learn
Estimate
23 x 18
2 x 2 x 10 x 10
20 x 20
Problem 1
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Learn
Estimate
456 × 42
Problem 2
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Learn
Estimate
456 × 42
460 x 40
Problem 2
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Learn
Estimate
456 × 42
500 x 40
Problem 2
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Learn
Estimate
456 × 42
5 x 4 x 10 x 10 x 10
500 x 40
Problem 2
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Learn
Estimate
4560 × 42
Problem 3
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Learn
Estimate
4560 × 420
Problem 4
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Learn
Estimate
1,320 x 88
Problem 5
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Estimate
13,205 × 880
1,320 × 88 ≈ 90,000
Problem 6
✔Check Understanding
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Estimate
3,120 × 880
Problem 7
✔Check Understanding
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Practice
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Review