3.1 Finiding Unknowns, Principles, Book 2, 8th

Finding Unknowns — List the number the question mark is standing for in each equation.
9 - ? = 7
Example Meaning: If we had 9 cookies on a plate, and only 7 are left now, how many were eaten?

(a)  

Tags

CCSS.1.OA.D.8

Finding Unknowns — List the number the question mark is standing for in each equation.

1 + ? = 7

Example Meaning: If we’ve finished 1 page of a book, how many more pages do we have left to finish 7 pages total?

(a)  

Tags

CCSS.1.OA.A.1

Finding Unknowns — List the number the question mark is standing for in each equation.

6 - ? = 6

Example Meaning: If we start with $6 and end with $6, how much did we spend?

(a)  

Tags

CCSS.1.OA.D.8

CCSS.1.OA.B.4

Tags

CCSS.3.OA.A.4

Finding Unknowns — List the number the question mark is standing for in each equation.

? ÷ 5 = 9

Example Meaning: If we can’t remember how long it took us altogether to complete all 9 problems, but we know we spent 5 minutes on each problem, how long did it take us altogether?

(a)  

Tags

CCSS.3.OA.B.6

More Finding Unknowns — List the number x is standing for in each equation.

2 + x = 11

Example Meaning: If we put together 2 flower bouquets for a wedding, how many more bouquets are needed if we need 11 total?

(a)  

Tags

CCSS.1.OA.B.3

More Finding Unknowns — List the number x is standing for in each equation.

20 - x = 14

Example Meaning: If we start a trip with $20, how much can we spend if we need to end the trip with $14?

(a)  

Tags

CCSS.2.OA.A.1

If we need 6 packages of party invitations, how much can we afford to spend on each package if we can spend a total of $54 on all the invitations?

Tags

CCSS.3.OA.A.3

If we can spend $28 buying pizza, how many pizzas can we buy if each pizza costs $7?

Tags

CCSS.3.OA.A.3

If in a board game, we started a certain number of spaces from start, moved 3 spaces away from start, and ended 8 spaces from start, how many spaces from start were we before we moved 3 additional spaces?

Tags

CCSS.7.NS.A.3