Multiplying by Multiples of 10: Grade 3 Math Test Answer Key – PDF Download

Grade 3 Multiply Test Answer Key: questions 1–5

Question 1: Quick products (2 points)

1. \(3 \times 6 = 18\), so \(3 \times 60 = 180\). 180
2. \(7 \times 4 = 28\), so \(7 \times 40 = 280\). 280

Scoring: 1 point for each correct product.

Question 2: Groups of tens (2 points)

There are 5 boxes with 4 tens in each. \(5 \times 40 = 200\), because \(5 \times 4 = 20\) tens is 200.

200

Scoring: 1 point for the sentence \(5 \times 40\), 1 point for 200.

Question 3: Missing factors (2 points)

1. 640 is 64 tens and \(8 \times 8 = 64\). 80
2. 270 is 27 tens and \(9 \times 3 = 27\). 9

Scoring: 1 point for each correct missing number.

Question 4: Jumps of 20 (2 points)

There are 6 jumps of 20. \(6 \times 20 = 120\).

120

Scoring: 1 point for \(6 \times 20\), 1 point for 120.

Question 5: Comparing (2 points)

1. \(6 \times 50 = 300\) and \(5 \times 60 = 300\). =
2. \(9 \times 30 = 270\) and \(8 \times 40 = 320\). <

Scoring: 1 point for each correct comparison.

Grade 3 Multiply Test Answer Key: questions 6–9

Question 6: Explaining a product (2 points)

1. \(7 \times 5 = 35\). 35
2. 50 is 5 tens, so 7 groups of 5 tens is 35 tens. 35 tens is 350. 350

Scoring: 1 point for 35, 1 point for an explanation that uses tens and gives 350.

Question 7: Tens grid (2 points)

There are \(3 \times 8 = 24\) squares worth 10 each. 24 tens is 240.

\(3 \times 80 = 240\)

Scoring: 1 point for the sentence \(3 \times 80\), 1 point for 240.

Question 8: School store (3 points)

1. \(7 \times 2 = 14\) tens, so \(7 \times 20 = 140\). 140 erasers
2. \(4 \times 6 = 24\) tens, so \(4 \times 60 = 240\). 240 pencils
3. \(140 + 240 = 380\). 380 items

Scoring: 1 point for each part.

Question 9: Find the mistake (3 points)

1. Jamal found \(8 \times 6 = 48\) but forgot that 60 is 6 tens, not 6 ones. The 48 is 48 tens.
2. \(8 \times 60 = 480\). 480
3. 60 is 6 tens. 8 groups of 6 tens is 48 tens. 48 tens is 480.

Scoring: 1 point for naming the missing tens, 1 point for 480, 1 point for the tens explanation.

Scoring summary

How to use this grade 3 multiply test answer key

Use this grade 3 multiply test answer key to score the test fairly and to see which skills need more practice.

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