Multiply in Columns
Grade 4 - Math - On Level
Multiply 2,943 x 6 using the standard column algorithm.
To multiply 3,195 x 4, start with the ones digit: 5 x 4 = 20. What digit do you carry to the tens column?
Continuing 2,791 x 4: the tens digit is 9. What is 9 x 4?
When multiplying 4 x 7 = 28 in one column, why do you write down 8 and carry the 2 to the next column?
- Because 8 is the larger of the two digits in 28, so it moves to the next column.
- Because 28 has 2 tens, which get added into the value of the next column.
- Because you always carry the ones digit and keep the tens digit in place.
- Because every two-digit product must be split evenly between two columns.
Round 3,443 to the nearest thousand to estimate 3,443 x 4. What is the estimate?
Which pair of smaller multiplications also equals 1,839 x 9?
- 1,000 x 10, plus 839 x 9
- 1,000 x 9, plus 839 x 9
- 1,000 x 9, plus 840 x 9
- 2,000 x 9, plus 839 x 9
A shipping company loads 443 boxes onto each of 2 trucks. How many boxes is that in all?
A student multiplies 4,326 x 6 and gets 2,595. Is that reasonable?
- No, because you should add 4,326 and 6 instead of multiplying.
- Yes, that product looks about right without checking an estimate.
- No, because 4,326 x 6 should be about 25,800, not 2,595.
- No, because a product must always be less than 4,326.
In 3,252 x 2, the thousands digit of 3,252 is 3. What is 3 x 2?
Multiply 4,400 x 3 using the standard column algorithm. Line up the digits by place value.