Common Core: 3rd Grade Math : Multiply One-Digit Numbers by Multiples of 10: CCSS.Math.Content.3.NBT.A.3

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

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Example Questions

Example Question #41 : Variables

\(\displaystyle \frac{\begin{array}[b]{r}10\\ \times\ 1\end{array}}{ \ \ \ \space}\)

Possible Answers:

\(\displaystyle 20\)

\(\displaystyle 11\)

\(\displaystyle 10\)

\(\displaystyle 30\)

\(\displaystyle 1\)

Correct answer:

\(\displaystyle 10\)

Explanation:

To solve this problem, we multiply \(\displaystyle 1\) by the ones position and the tens position. 

\(\displaystyle 1\times0=0\)

\(\displaystyle 1\times1=1\)

\(\displaystyle \frac{\begin{array}[b]{r}10\\ \times\ 1\end{array}}{ \ \ \space10}\)

Example Question #42 : Variables

\(\displaystyle \frac{\begin{array}[b]{r}20\\ \times\ 2\end{array}}{ \ \ \ \space}\)

 

Possible Answers:

\(\displaystyle 40\)

\(\displaystyle 20\)

\(\displaystyle 50\)

\(\displaystyle 22\)

\(\displaystyle 42\)

Correct answer:

\(\displaystyle 40\)

Explanation:

To solve this problem, we multiply \(\displaystyle 2\) by the ones position and the tens position. 

\(\displaystyle 2\times0=0\)

\(\displaystyle 2\times2=4\)

\(\displaystyle \frac{\begin{array}[b]{r}20\\ \times\ 2\end{array}}{ \ \ \space40}\)

Example Question #1 : Multiply One Digit Numbers By Multiples Of 10: Ccss.Math.Content.3.Nbt.A.3

\(\displaystyle \frac{\begin{array}[b]{r}40\\ \times\ 4\end{array}}{ \ \ \ \space}\)

 

Possible Answers:

\(\displaystyle 180\)

\(\displaystyle 120\)

\(\displaystyle 80\)

\(\displaystyle 160\)

\(\displaystyle 60\)

Correct answer:

\(\displaystyle 160\)

Explanation:

To solve this problem, we multiply \(\displaystyle 4\) by the ones position and the tens position. 

\(\displaystyle 4\times0=0\)

\(\displaystyle 4\times4=16\)

\(\displaystyle \frac{\begin{array}[b]{r}40\\ \times\ 4\end{array}}{ \ \space160}\)

Example Question #1 : Multiply One Digit Numbers By Multiples Of 10: Ccss.Math.Content.3.Nbt.A.3

\(\displaystyle \frac{\begin{array}[b]{r}50\\ \times\ 5\end{array}}{ \ \ \ \space}\)

 

Possible Answers:

\(\displaystyle 45\)

\(\displaystyle 10\)

\(\displaystyle 110\)

\(\displaystyle 25\)

\(\displaystyle 250\)

Correct answer:

\(\displaystyle 250\)

Explanation:

To solve this problem, we multiply \(\displaystyle 5\) by the ones position and the tens position. 

\(\displaystyle 5\times0=0\)

\(\displaystyle 5\times5=25\)

\(\displaystyle \frac{\begin{array}[b]{r}50\\ \times\ 5\end{array}}{ \ \space250}\)

Example Question #43 : Variables

\(\displaystyle \frac{\begin{array}[b]{r}60\\ \times\ 6\end{array}}{ \ \ \ \space}\)

 

Possible Answers:

\(\displaystyle 180\)

\(\displaystyle 360\)

\(\displaystyle 120\)

\(\displaystyle 240\)

\(\displaystyle 540\)

Correct answer:

\(\displaystyle 360\)

Explanation:

To solve this problem, we multiply \(\displaystyle 6\) by the ones position and the tens position. 

\(\displaystyle 6\times0=0\)

\(\displaystyle 6\times6=36\)

\(\displaystyle \frac{\begin{array}[b]{r}60\\ \times\ 6\end{array}}{ \ \space360}\)

Example Question #3261 : Ssat Elementary Level Quantitative (Math)

Solve the following: 

\(\displaystyle \frac{\begin{array}[b]{r}70\\ \times\ 7\end{array}}{ \ \ \ \space}\) 

Possible Answers:

\(\displaystyle 500\)

\(\displaystyle 520\)

\(\displaystyle 140\)

\(\displaystyle 420\)

\(\displaystyle 490\)

Correct answer:

\(\displaystyle 490\)

Explanation:

To solve this problem, we multiply \(\displaystyle 7\) by the ones position and the tens position. 

\(\displaystyle 7\times0=0\)

\(\displaystyle 7\times7=49\)

\(\displaystyle \frac{\begin{array}[b]{r}70\\ \times\ 7\end{array}}{ \ \space490}\)

Example Question #3 : Multiply One Digit Numbers By Multiples Of 10: Ccss.Math.Content.3.Nbt.A.3

\(\displaystyle \frac{\begin{array}[b]{r}80\\ \times\ 8\end{array}}{ \ \ \ \space}\)

 

Possible Answers:

\(\displaystyle 440\)

\(\displaystyle 480\)

\(\displaystyle 680\)

\(\displaystyle 160\)

\(\displaystyle 640\)

Correct answer:

\(\displaystyle 640\)

Explanation:

To solve this problem, we multiply \(\displaystyle 8\) by the ones position and the tens position. 

\(\displaystyle 8\times0=0\)

\(\displaystyle 8\times8=64\)

\(\displaystyle \frac{\begin{array}[b]{r}80\\ \times\ 8\end{array}}{ \ \space640}\)

Example Question #51 : Variables

\(\displaystyle \frac{\begin{array}[b]{r}90\\ \times\ 9\end{array}}{ \ \ \ \space}\)

 

Possible Answers:

\(\displaystyle 810\)

\(\displaystyle 99\)

\(\displaystyle 81\)

\(\displaystyle 900\)

\(\displaystyle 90\)

Correct answer:

\(\displaystyle 810\)

Explanation:

To solve this problem, we multiply \(\displaystyle 9\) by the ones position and the tens position. 

\(\displaystyle 9\times0=0\)

\(\displaystyle 9\times9=81\)

\(\displaystyle \frac{\begin{array}[b]{r}90\\ \times\ 9\end{array}}{ \ \space810}\)

Example Question #6 : Multiply One Digit Numbers By Multiples Of 10: Ccss.Math.Content.3.Nbt.A.3

\(\displaystyle \frac{\begin{array}[b]{r}20\\ \times\ 1\end{array}}{ \ \ \ \space}\)

 

Possible Answers:

\(\displaystyle 15\)

\(\displaystyle 20\)

\(\displaystyle 10\)

\(\displaystyle 2\)

\(\displaystyle 25\)

Correct answer:

\(\displaystyle 20\)

Explanation:

To solve this problem, we multiply \(\displaystyle 1\) by the ones position and the tens position. 

\(\displaystyle 1\times0=0\)

\(\displaystyle 1\times2=2\)

\(\displaystyle \frac{\begin{array}[b]{r}20\\ \times\ 1\end{array}}{ \ \ \space20}\)

Example Question #7 : Multiply One Digit Numbers By Multiples Of 10: Ccss.Math.Content.3.Nbt.A.3

\(\displaystyle \frac{\begin{array}[b]{r}30\\ \times\ 2\end{array}}{ \ \ \ \space}\)

 

Possible Answers:

\(\displaystyle 30\)

\(\displaystyle 80\)

\(\displaystyle 60\)

\(\displaystyle 70\)

\(\displaystyle 50\)

Correct answer:

\(\displaystyle 60\)

Explanation:

To solve this problem, we multiply \(\displaystyle 2\) by the ones position and the tens position. 

\(\displaystyle 2\times0=0\)

\(\displaystyle 2\times3=6\)

\(\displaystyle \frac{\begin{array}[b]{r}30\\ \times\ 2\end{array}}{ \ \ \space60}\)

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