Estimating Addends to Find Sums

Find the Missing Addend: 3 + ___ = 15

• 18

• 15

• 12

• 9

Tags

CCSS.1.OA.D.8

Find the Missing Addend 12 + ___ = 19

• 7

• 31

• 5

• 21

Tags

CCSS.1.OA.D.8

Find the Missing Addend

6 + ___ = 15

Tags

CCSS.1.OA.A.1

Find the Missing Addend 5 + ___ = 16

• 11

• 12

• 10

• 13

Tags

CCSS.1.OA.D.8

Use mental math to solve.

120 + 42 + 80

Tags

CCSS.2.NBT.B.5

Find the sum of 12908; 456; 7843

Tags

CCSS.6.NS.B.3

• 400 + 200 = 600
• 500 + 200 = 600
• 500 + 200 = 700
• 400 + 200 = 700

Tags

CCSS.2.NBT.B.5

Find the Missing Addend

14 + ___ = 19

Tags

CCSS.1.OA.D.8

Estimating Sums: which words give clues that you will look for an estimate and not an actual number?

• in all

• about how many

• find the sum

Which words are associated with addition?

• difference, subtract

• sum, addend

• value, estimate

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2