Common Core: 2nd Grade Math : Number & Operations in Base Ten

Study concepts, example questions & explanations for Common Core: 2nd Grade Math

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Example Questions

Example Question #501 : Number & Operations In Base Ten

How many tens are in the number \(\displaystyle 600?\)

 

Possible Answers:

Zero

Sixteen

Six

Sixty

Six hundred

Correct answer:

Sixty

Explanation:

There are 60 tens in the number 600 because \(\displaystyle 60\times10=600\)

Example Question #502 : Number & Operations In Base Ten

How many ones are in the number \(\displaystyle 500?\)

 

Possible Answers:

Seven

Three

Six

Five hudred

Zero

Correct answer:

Five hudred

Explanation:

There are five hundred ones in the number 500 because \(\displaystyle 500\times1=500\)

Example Question #503 : Number & Operations In Base Ten

How many tens are in the number \(\displaystyle 300?\)

 

Possible Answers:

Three

Five

Zero

Thirty

Three hundred

Correct answer:

Thirty

Explanation:

There are thirty tens in the number 300 because \(\displaystyle 30\times10=300\)

Example Question #504 : Number & Operations In Base Ten

How many ones are in the number \(\displaystyle 200?\)

 

Possible Answers:

Twenty-two

Twenty

Two

Zero

Two hundred

Correct answer:

Two hundred

Explanation:

There are two hundred ones in the number 200 because \(\displaystyle 200\times1=200\)

Example Question #1 : Count Within 1000 By 1s, 5s, 10s, And 100s, Ccss.Math.Content.2.Nbt.A.2

What is the missing number? \(\displaystyle 5, 10,\) __________\(\displaystyle 20, 25\)

Possible Answers:

\(\displaystyle 20\)

\(\displaystyle 13\)

\(\displaystyle 15\)

\(\displaystyle 14\)

\(\displaystyle 11\)

Correct answer:

\(\displaystyle 15\)

Explanation:

In this series we are counting by \(\displaystyle 5\). When counting by \(\displaystyle 5\), \(\displaystyle 15\) is between \(\displaystyle 10\) and \(\displaystyle 20\).

Example Question #2 : Count Within 1000 By 1s, 5s, 10s, And 100s, Ccss.Math.Content.2.Nbt.A.2

What is the missing number? \(\displaystyle 110, 120, 130,\) __________, \(\displaystyle 150\)

Possible Answers:

\(\displaystyle 135\)

\(\displaystyle 140\)

\(\displaystyle 139\)

\(\displaystyle 160\)

\(\displaystyle 145\)

Correct answer:

\(\displaystyle 140\)

Explanation:

In this series we are counting by \(\displaystyle 10\). When counting by \(\displaystyle 10\), \(\displaystyle 140\) is between \(\displaystyle 130\) and \(\displaystyle 150\)

Example Question #3 : Count Within 1000 By 1s, 5s, 10s, And 100s, Ccss.Math.Content.2.Nbt.A.2

What is the missing number? \(\displaystyle 50\), __________\(\displaystyle 70, 80, 90\)

Possible Answers:

\(\displaystyle 40\)

\(\displaystyle 61\)

\(\displaystyle 59\)

\(\displaystyle 55\)

\(\displaystyle 60\)

Correct answer:

\(\displaystyle 60\)

Explanation:

In this series we are counting by \(\displaystyle 10\). When counting by \(\displaystyle 10\), \(\displaystyle 60\) is between \(\displaystyle 50\) and \(\displaystyle 70\)

Example Question #4 : Count Within 1000 By 1s, 5s, 10s, And 100s, Ccss.Math.Content.2.Nbt.A.2

What is the missing number? \(\displaystyle 25, 30, 35,\) __________\(\displaystyle 45\)

Possible Answers:

\(\displaystyle 60\)

\(\displaystyle 40\)

\(\displaystyle 50\)

\(\displaystyle 39\)

\(\displaystyle 36\)

Correct answer:

\(\displaystyle 40\)

Explanation:

In this series we are counting by \(\displaystyle 5\). When counting by \(\displaystyle 5\), \(\displaystyle 40\) is between \(\displaystyle 35\) and \(\displaystyle 45.\)

Example Question #5 : Count Within 1000 By 1s, 5s, 10s, And 100s, Ccss.Math.Content.2.Nbt.A.2

What is the missing number? \(\displaystyle 90, 100,\) __________\(\displaystyle 120, 130\)

Possible Answers:

\(\displaystyle 119\)

\(\displaystyle 110\)

\(\displaystyle 140\)

\(\displaystyle 101\)

\(\displaystyle 120\)

Correct answer:

\(\displaystyle 110\)

Explanation:

In this series we are counting by \(\displaystyle 10\). When counting by \(\displaystyle 10\), \(\displaystyle 110\) is between \(\displaystyle 100\) and \(\displaystyle 120\)

Example Question #4 : Count Within 1000 By 1s, 5s, 10s, And 100s, Ccss.Math.Content.2.Nbt.A.2

What is the missing number? \(\displaystyle 755,\)___________\(\displaystyle 765, 770, 775\)

Possible Answers:

\(\displaystyle 780\)

\(\displaystyle 764\)

\(\displaystyle 760\)

\(\displaystyle 750\)

\(\displaystyle 756\)

Correct answer:

\(\displaystyle 760\)

Explanation:

In this series we are counting by \(\displaystyle 5\). When counting by \(\displaystyle 5\), \(\displaystyle 760\) is between \(\displaystyle 755\) and \(\displaystyle 765\)

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