Common Core: 3rd Grade Math : Operations & Algebraic Thinking

Study concepts, example questions & explanations for Common Core: 3rd Grade Math

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Example Questions

Example Question #361 : Representing And Solving Problems Involving Multiplication And Division

Fill in the blank. 

\displaystyle 5=1\times __________

 

Possible Answers:

\displaystyle 8

\displaystyle 6

\displaystyle 7

\displaystyle 5

\displaystyle 9

Correct answer:

\displaystyle 5

Explanation:

The opposite of multiplication is division. In order to find the missing piece of this multiplication problem we can divide. 

\displaystyle 5\div1=5

\displaystyle 1\times5=5

Example Question #362 : Representing And Solving Problems Involving Multiplication And Division

Fill in the blank. 

\displaystyle 18=2\times __________

 

Possible Answers:

\displaystyle 9

\displaystyle 5

\displaystyle 6

\displaystyle 7

\displaystyle 8

Correct answer:

\displaystyle 9

Explanation:

The opposite of multiplication is division. In order to find the missing piece of this multiplication problem we can divide. 

\displaystyle 18\div2=9

\displaystyle 2\times9=18

Example Question #361 : Common Core Math: Grade 3

Fill in the blank. 

\displaystyle 12=3\times __________

 

Possible Answers:

\displaystyle 4

\displaystyle 2

\displaystyle 6

\displaystyle 5

\displaystyle 3

Correct answer:

\displaystyle 4

Explanation:

The opposite of multiplication is division. In order to find the missing piece of this multiplication problem we can divide. 

\displaystyle 12\div3=4

\displaystyle 3\times4=12

Example Question #71 : Determine The Unknown Number In A Multiplication Or Division Equation: Ccss.Math.Content.3.Oa.A.4

Fill in the blank. 

\displaystyle 28=4\times __________

 

Possible Answers:

\displaystyle 4

\displaystyle 5

\displaystyle 7

\displaystyle 3

\displaystyle 8

Correct answer:

\displaystyle 7

Explanation:

The opposite of multiplication is division. In order to find the missing piece of this multiplication problem we can divide. 

\displaystyle 28\div4=7

\displaystyle 4\times7=28

Example Question #365 : Representing And Solving Problems Involving Multiplication And Division

Fill in the blank. 

\displaystyle 10=5\times __________

 

Possible Answers:

\displaystyle 3

\displaystyle 5

\displaystyle 2

\displaystyle 1

\displaystyle 4

Correct answer:

\displaystyle 2

Explanation:

The opposite of multiplication is division. In order to find the missing piece of this multiplication problem we can divide. 

\displaystyle 10\div5=2

\displaystyle 5\times2=10

Example Question #72 : Determine The Unknown Number In A Multiplication Or Division Equation: Ccss.Math.Content.3.Oa.A.4

Fill in the blank. 

\displaystyle 54=6\times __________

 

Possible Answers:

\displaystyle 9

\displaystyle 7

\displaystyle 11

\displaystyle 8

\displaystyle 10

Correct answer:

\displaystyle 9

Explanation:

The opposite of multiplication is division. In order to find the missing piece of this multiplication problem we can divide. 

\displaystyle 54\div6=9

\displaystyle 6\times9=54

Example Question #73 : Determine The Unknown Number In A Multiplication Or Division Equation: Ccss.Math.Content.3.Oa.A.4

Fill in the blank. 

\displaystyle 42=7\times __________

 

Possible Answers:

\displaystyle 9

\displaystyle 6

\displaystyle 8

\displaystyle 7

\displaystyle 10

Correct answer:

\displaystyle 6

Explanation:

The opposite of multiplication is division. In order to find the missing piece of this multiplication problem we can divide. 

\displaystyle 42\div7=6

\displaystyle 7\times6=42

Example Question #74 : Determine The Unknown Number In A Multiplication Or Division Equation: Ccss.Math.Content.3.Oa.A.4

Fill in the blank. 

\displaystyle 80=8\times __________

 

Possible Answers:

\displaystyle 9

\displaystyle 8

\displaystyle 10

\displaystyle 7

\displaystyle 11

Correct answer:

\displaystyle 10

Explanation:

The opposite of multiplication is division. In order to find the missing piece of this multiplication problem we can divide. 

\displaystyle 80\div8=10

\displaystyle 8\times10=80

Example Question #81 : Determine The Unknown Number In A Multiplication Or Division Equation: Ccss.Math.Content.3.Oa.A.4

Fill in the blank. 

\displaystyle 45=9\times __________

 

Possible Answers:

\displaystyle 5

\displaystyle 6

\displaystyle 8

\displaystyle 7

\displaystyle 4

Correct answer:

\displaystyle 5

Explanation:

The opposite of multiplication is division. In order to find the missing piece of this multiplication problem we can divide. 

\displaystyle 45\div9=5

\displaystyle 9\times5=45

Example Question #81 : Determine The Unknown Number In A Multiplication Or Division Equation: Ccss.Math.Content.3.Oa.A.4

Fill in the blank. 

\displaystyle 20=10\times __________

 

Possible Answers:

\displaystyle 6

\displaystyle 3

\displaystyle 4

\displaystyle 2

\displaystyle 5

Correct answer:

\displaystyle 2

Explanation:

The opposite of multiplication is division. In order to find the missing piece of this multiplication problem we can divide. 

\displaystyle 20\div10=2

\displaystyle 10\times2=20

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