Multi-Digit Multiplication Quiz

Grade 4 · Math · Quiz

Test your skills multiplying two- and three-digit numbers using the standard algorithm.

Questions

What is 43 × 6?
1. 248
2. 258
3. 268
4. 278
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Answer: 258
43 × 6: 3 × 6 = 18 (write 8, carry 1); 4 × 6 + 1 = 25. Result: 258.
What is 56 × 23?
1. 1,178
2. 1,228
3. 1,288
4. 1,388
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Answer: 1,288
56 × 23: 56 × 3 = 168 and 56 × 20 = 1,120; 168 + 1,120 = 1,288.
A teacher has 18 boxes of crayons. Each box has 24 crayons. How many crayons are there in all?
1. 322
2. 372
3. 422
4. 432
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Answer: 432
18 × 24: 18 × 4 = 72 and 18 × 20 = 360; 72 + 360 = 432.
Which expression shows the correct partial products for 32 × 15?
1. 32 × 1 and 32 × 5
2. 32 × 5 and 32 × 10
3. 30 × 15 and 2
4. 32 × 15 only
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Answer: 32 × 5 and 32 × 10
To find partial products for 32 × 15, multiply 32 × 5 = 160 and 32 × 10 = 320, then add: 160 + 320 = 480.
The product of 99 × 9 is greater than 900.
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Answer: False
99 × 9 = 891, which is less than 900. You can check: 100 × 9 = 900, and 99 is one less than 100, so 99 × 9 = 900 − 9 = 891.
What is 124 × 3?
1. 362
2. 372
3. 382
4. 392
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Answer: 372
124 × 3: 4 × 3 = 12 (write 2, carry 1); 2 × 3 + 1 = 7; 1 × 3 = 3. Result: 372.
When multiplying 45 × 20, the answer is the same as 45 × 2 with a _____ added at the end.
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Answer: 0
Multiplying by 20 is the same as multiplying by 2 and then by 10. Adding a 0 at the end is equivalent to multiplying by 10.
A school orders 15 packs of pencils. Each pack has 12 pencils. Which estimate is closest to the total number of pencils?
1. 100
2. 150
3. 200
4. 250
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Answer: 200
Round 15 to 20 and 12 to 10: 20 × 10 = 200. The actual answer is 180, so 200 is the closest estimate listed.

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