Estimation & Equality

About how many fish would fit in a fish tank?

• 1
• 10
• 100

About how many cookies can fit on a plate?

• 2
• 20
• 200

About how many people could fit in a row-boat?

• 3
• 30
• 300

Tags

CCSS.8.EE.A.3

About how many marbles are in the jar?

• 2
• 20
• 200

Tags

CCSS.1.NBT.A.1

4+1=

• 3+2
• 6+1
• 3+8
• 5+9

Tags

CCSS.1.OA.B.3

8-2=

• 2+9
• 6-1
• 5+1
• 3+2

Tags

CCSS.K.OA.A.1

CCSS.K.OA.A.2

2+7=

• 3+5
• 2+4
• 6-5
• 10-1

Tags

CCSS.1.OA.C.6

CCSS.2.OA.B.2

4+4=

• 7+1
• 6-3
• 4+0
• 9+1

Tags

CCSS.1.OA.B.3

7-1=

• 2+9
• 3+3
• 4+5
• 2-1

Tags

CCSS.1.OA.A.1

2+1

• 9-7
• 3+7
• 4-1
• 6+0

Tags

CCSS.1.OA.C.6

CCSS.2.OA.B.2