Add tens and ones (1st: 3.2)

 $60+6=$  
_____ tens _____ ones

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Answer explanation

Be sure to have the correct amount of tens and ones. There are 6 tens and 6 ones, giving us the number 66.

Tags

CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

 $50+3=$  
_____ tens _____ ones

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Answer explanation

Be sure to write the correct tens and ones. 50 is the same as 5 tens. 3 is the same as 3 ones. If you put the tens and ones together, you get 53.

Tags

CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

 $90+8=$  
_____ tens _____ ones

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Answer explanation

Be sure  you put the right digits in the correct place values. 90 is the same as 9 tens. 8 is the same as 8 ones. If you put 9 in the tens place and 8 in the ones place, you get the number 98. 90+8=98.

Tags

CCSS.2.NBT.B.6

 $20+1=$  
_____ tens _____ ones

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Answer explanation

Be sure  you put the right digits in the correct place values. 20 is the same as 2 tens. 1 is the same as 1 ones. If you put 2 in the tens place and 1 in the ones place, you get the number 21. 20+1=21.

Tags

CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

 $40+2=$  
_____ tens _____ ones

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Answer explanation

Be sure  you put the right digits in the correct place values. 40 is the same as 4 tens. 2 is the same as 2 ones. If you put 4 in the tens place and 2 in the ones place, you get the number 42. 40+2=42.

Tags

CCSS.2.OA.A.1

 $70+9=$  
_____ tens _____ ones

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Answer explanation

Be sure  you put the right digits in the correct place values. 70 is the same as 7 tens. 9 is the same as 9 ones. If you put 7 in the tens place and 9 in the ones place, you get the number 79. 70+9=79.

Tags

CCSS.2.OA.A.1

Luke has 30 blocks. Elle has 6 blocks. How many blocks do they have?

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Answer explanation

Be sure you put the right digits in the correct place values. 30 is the same as 3 tens. 6 is the same as 6 ones. If you put 3 in the tens place and 6 in the ones place, you get the number 36. 30+6=36.

Tags

CCSS.2.NBT.B.6

Laura planted two pepper plants. One grew 10 peppers. The other grew 6. Which number sentence shows how many peppers grew in all?

• $10-4=6$

• $10+6=16$

• $1+6=7$

Answer explanation

We know to add the amount of peppers because it asked "how many peppers grew in all?" It did not ask us for the difference or to compare the two plants. It asked for us to combine the number of peppers grown. That means we add 10 and 6. 10 is the same as 1 ten. 6 is the same as 6 ones. If we put 1 in the tens place and 6 in the ones place, we get the number 16. 10+6=16.

Tags

CCSS.2.OA.A.1

Which shows
 $30+5=35$  ?

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Answer explanation

To show 30+5=35 you need 3 tens blocks and 5 ones blocks. The other answers are not correct because they show the wrong amount of tens and ones. Be sure you are showing the correct place value with the blocks!

Tags

CCSS.2.OA.A.1

What is the sum?

 $50+7=$  

• 57

• 75

• 12

• 55

Tags

CCSS.2.NBT.B.5