Understanding Mayan Numbers and Their Addition

This video tutorial explains the addition of Mayan numbers, a base 20 system with unique symbols for numbers 0 to 19. It covers the rules for exchanging dots and bars, and provides two examples: adding 48 and 69, and adding 278 and 247. The tutorial demonstrates how to perform these additions by aligning symbols horizontally and making necessary exchanges to adhere to the Mayan system's constraints.

What is the base of the Mayan number system?

• Base 10

• Base 20

• Base 5

• Base 2

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In the Mayan number system, what does a dot represent?

• 0

• 1

• 5

• 10

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CCSS.4.NBT.A.2

How many bars are allowed in any place value in the Mayan system?

• 5

• 2

• 3

• 4

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What is the Mayan representation for the number 48?

• 3 20s and 5 1s

• 3 20s and 8 1s

• 2 20s and 8 1s

• 2 20s and 5 1s

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CCSS.5.NBT.B.7

When adding Mayan numbers, what is the first step?

• Add symbols horizontally

• Add symbols vertically

• Subtract symbols

• Convert to base 10

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What is the sum of 48 and 69 in Mayan numbers?

• 125

• 120

• 100

• 117

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How many 20s are there in the Mayan number 278?

• 10

• 11

• 12

• 13

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CCSS.2.NBT.B.7

What is the sum of 278 and 247 in Mayan numbers?

• 525

• 515

• 500

• 535

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CCSS.2.NBT.B.7

In the example of adding 278 and 247, what is exchanged for 1 dot in the 400s place?

• 2 dots

• 3 bars

• 5 dots

• 4 bars

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CCSS.5.NBT.B.7

What is the final step in verifying the addition of Mayan numbers?

• Check the base 10 conversion

• Re-add the numbers

• Use a calculator

• Ensure no more than 3 bars and 4 dots

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CCSS.5.NBT.B.7