Fluency Within 20, Even and Odd Numbers: Grade 2 Math Worksheet Answer Key – PDF Download

Grade 2 Fluency Worksheet Answer Key: problems 1–5

Problem 1: Doubles facts

1. \(4+4=8\)
2. \(6+6=12\)
3. \(8+8=16\)
4. \(9+9=18\)

Problem 2: Make a ten with frames

Move 1 dot from the 6 to the 9. The left frame is full (10) and 5 dots are left.

\(10+5=15\), so \(9+6\)\(=15\).

Problem 3: Add facts

1. \(8+3=11\)
2. \(7+4=11\)
3. \(9+5=14\)
4. \(6+9=15\)

Problem 4: Near doubles

1. \(6+6=12\), one more is \(13\)
2. \(8+8=16\), one more is \(17\)
3. \(5+5=10\), one more is \(11\)
4. \(7+7=14\), one more is \(15\)

Problem 5: Count on

1. \(14+3=17\)
2. \(15+4=19\)
3. \(16+2=18\)
4. \(17+3=20\)

Grade 2 Fluency Worksheet Answer Key: problems 6–10

Problem 6: Missing addend

1. \(6\): \(8+6=14\)
2. \(5\): \(7+5=12\)
3. \(8\): \(9+8=17\)
4. \(9\): \(6+9=15\)

Problem 7: Subtract facts

1. \(12-5=7\)
2. \(15-9=6\)
3. \(13-6=7\)
4. \(17-8=9\)

Problem 8: Count back on a number line

Jump back 4 to reach 10, then back 4 more to reach 6.

\(14-8=6\)

Problem 9: Subtract through ten

1. \(15-5=10\), then \(10-2=8\). \(15-7=8\)
2. \(16-6=10\), then \(10-3=7\). \(16-9=7\)
3. \(14-4=10\), then \(10-1=9\). \(14-5=9\)
4. \(18-8=10\), then \(10-1=9\). \(18-9=9\)

Problem 10: Missing number in subtraction

1. \(7\): \(16-7=9\)
2. \(8\): \(13-8=5\)
3. \(15\): \(15-6=9\)
4. \(16\): \(16-4=12\)

Grade 2 Fluency Worksheet Answer Key: problems 11–15

Problem 11: Fact family

\(7+8=15\), \(8+7=15\), \(15-7=8\), \(15-8=7\)

Problem 12: Even or odd

1. \(6\) is even
2. \(11\) is odd
3. \(14\) is even
4. \(17\) is odd
5. \(20\) is even

Problem 13: Pair the dots

Nine makes 4 pairs and 1 left over, so 9 is odd. Twelve makes 6 pairs with none left, so 12 is even.

Problem 14: Skip count by 2

Keep jumping by 2: 6, 10, 14, 18. All of these numbers are even.

Problem 15: Equal addends

1. \(10=5+5\)
2. \(14=7+7\)
3. \(18=9+9\)
4. \(6=3+3\)

Grade 2 Fluency Worksheet Answer Key: problems 16–20

Problem 16: Double plus one

1. \(13=6+6+1\)
2. \(9=4+4+1\)
3. \(17=8+8+1\)

Problem 17: Odd one out

1. \(13\) is odd. The others are even.
2. \(12\) is even. The others are odd.

Problem 18: Doubles are even

1. \(5+5=10\), even
2. \(8+8=16\), even
3. \(9+9=18\), even

A double always splits into two equal groups, so it is always even.

Problem 19: Stickers

Add the two parts: \(8+7=15\). (Make a ten: 8 + 2 = 10, then 10 + 5 = 15.)

Maya has 15 stickers.

Problem 20: Bake sale cupcakes

Subtract: \(15-5=10\), then \(10-1=9\). So \(15-6=9\).

There are 9 cupcakes left.

Grade 2 Fluency Worksheet Answer Key: problems 21–24

Problem 21: Marbles

\(9+9=18\), a double.

Liam has 18 marbles. The number is even.

Problem 22: Throwing partners

\(13=6+6+1\). That is 6 pairs and 1 player left over.

No. 13 is odd, so one player has no partner.

Problem 23: Tulips

\(7+7=14\), then \(14+4=18\).

There are 18 tulips. 18 is even.

Problem 24: Sticker trade

\(17-9=8\), then \(8+6=14\).

Aisha has 14 stickers, and \(14=7+7\).

How to use this grade 2 fluency worksheet answer key

Read this grade 2 fluency worksheet answer key after trying each problem yourself, and redo any problem you missed.

See every chapter on the Grade 2 math page.