Adding and Subtracting Tens Within 100: Grade 1 Math Test Answer Key – PDF Download

Grade 1 Adding Test Answer Key: questions 1–5

Question 1: Add the ones (3 points)

1. 2 + 5 = 7 ones, 4 tens stay. 47.
2. 3 + 4 = 7 ones, 6 tens stay. 67.
3. \(28 + 2 = 30\), \(30 + 5 = 35\). 35.

Scoring: 1 point for each correct sum.

Question 2: Add tens (3 points)

1. 4 tens + 3 tens = 7 tens. 70.
2. 3 tens + 2 tens = 5 tens, 6 ones stay. 56.
3. 5 tens + 4 tens = 9 tens, 4 ones stay. 94.

Scoring: 1 point for each correct sum.

Question 3: 10 more and 10 less (3 points)

1. One row down from 52 is 62.
2. One row up from 52 is 42.
3. 7 tens becomes 8 tens, and 9 ones stay. 89.

Scoring: 1 point for each correct number.

Question 4: Subtract tens (3 points)

1. 6 tens – 2 tens = 4 tens. 40.
2. 9 tens – 5 tens = 4 tens. 40.
3. 7 tens – 4 tens = 3 tens. 30.

Scoring: 1 point for each correct difference.

Question 5: Read the blocks (2 points)

1. 4 tens and 3 ones make 43.
2. \(43 + 30 = 73\) (4 tens + 3 tens = 7 tens, 3 ones stay). 73.

Scoring: 1 point for 43. 1 point for 73.

Grade 1 Adding Test Answer Key: questions 6–8

Question 6: Missing number (2 points)

1. 3 tens to 6 tens is 3 tens. \(35 + 30 = 65\). 30.
2. 9 tens take away 3 tens leaves 6 tens. \(90 – 60 = 30\). 60.

Scoring: 1 point for each correct number.

Question 7: Baseball cards (2 points)

1. \(48 + 6 = ?\)
2. \(48 + 2 = 50\), \(50 + 4 = 54\). Liam has 54 baseball cards.

Scoring: 1 point for the equation. 1 point for 54.

Question 8: Bakery muffins (2 points)

Step 1: \(60 – 40 = 20\). Step 2: \(20 + 30 = 50\).

The bakery has 50 muffins.

Scoring: 1 point for 20 after the sale. 1 point for the final answer, 50.

Scoring summary

How to use this grade 1 adding test answer key

Use this grade 1 adding test answer key to score the test fairly and to see which skills need more practice.

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Grade 1 Adding and Subtracting Tens Within 100 test answer key

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