grade 2 module 6 lesson 19

How many circles are in this array? Skip-count the columns to find the answer. The first one has been done for you.

• 10

• 12

• 18

• 20

Solve:

1 + 1 = _____

2 + 2 = _____

3 + 3 = _____

• 1 + 1 = 1

  2 + 2 = 2

  3 + 3 = 3

• 1 + 1 = 2

  2 + 2 = 4

  3 + 3 = 6

• 1 + 1 = 2

  2 + 2 = 5

  3 + 3 = 7

• 1 + 1 = 1

  2 + 2 = 4

  3 + 3 = 5

Solve:

4 + 4 = _____

5 + 5 = _____

6 + 6 = _____

• 4 + 4 = 4

  5 + 5 = 5

  6 + 6 = 6

• 4 + 4 = 8

  5 + 5 = 11

  6 + 6 = 12

• 4 + 4 = 9

  5 + 5 = 10

  6 + 6 = 15

• 4 + 4 = 8

  5 + 5 = 10

  6 + 6 = 12

Solve:

7 +7 = _____

8 + 8 = _____

9 + 9 = _____

10 + 10 = _____

• 7 +7 = 7

  8 + 8 = 8

  9 + 9 = 9

  10 + 10 = 10

• 7 +7 = 15

  8 + 8 = 16

  9 + 9 = 17

  10 + 10 = 18

• 7 +7 = 14

  8 + 8 = 16

  9 + 9 = 18

  10 + 10 = 20

• 7 +7 = 14

  8 + 8 = 15

  9 + 9 = 19

  10 + 10 = 20

Which observation is correct about this set of problems?

• Pairs of numbers will always make an odd number when added together.

• There is no pattern when adding pairs of numbers

• Pairs of numbers will always make an even number when added together.

• Pairs of numbers will sometimes make even numbers and sometimes make odd numbers when added together.

Find the missing numbers on the number path.

***The options for the missing numbers are in red.***

• 20, 22, 24, 25, 28, 30, 31, 32, 36, 40, 41, 42, 46, 47, 48

• 20, 22, 24, 26, 28, 30, 32, 34, 36, 40, 42, 44, 46, 48, 50

• 20, 22, 24, 22, 28, 30, 22, 22, 36, 40, 22, 22, 46, 22, 22

• 20, 22, 24, 26, 28, 30, 32, 33, 36, 40, 42, 43, 46, 48, 49

Fill in the odd numbers on the number path.

***The options for the missing numbers are in red.***

• 0, 1, 2, 1, 4, 1, 6, 1, 8, 1, 10, 1, 12, 1, 14, 1, 16, 1, 18, 1, 20

• 0, 1, 2, 3, 4, 5, 6, 9, 8, 9, 10, 9, 12, 9, 14, 9, 16, 9, 18, 9, 20

• 0, 1, 2, 2, 4, 4, 6, 6, 8, 8, 10, 10, 12, 12, 14, 14, 16, 16, 18, 18, 20

• 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20

Which statement is true about this number sentence?

Example: 6 + 1 = 7

even + 1 = odd

• even + 1 = odd

• odd + 1 = even

• even + 1 = even

• odd + 1 = odd

Which statement is true about this number sentence?

Example: 6 + 1 = 7

even + 1 = odd

• even + 1 = odd

• odd + 1 = even

• even + 1 = even

• odd + 1 = odd

Which statement is true about this number sentence?

Example: 6 + 1 = 7

even + 1 = odd

• even + 1 = odd

• odd + 1 = even

• even - 1 = odd

• odd - 1 = even