Multiply in Columns
Grade 4 - Math - Challenge Me
Multiply 4,398 x 3 using the standard column algorithm.
To multiply 2,834 x 6, start with the ones digit: 4 x 6 = 24. What digit do you carry to the tens column?
Continuing 9,535 x 7: the tens digit is 3. 3 x 7 = 21, plus the carried 3 makes 24. What digit do you write in the tens place?
When multiplying 4 x 7 = 28 in one column, why do you write down 8 and carry the 2 to the next column?
- Because you always carry the ones digit and keep the tens digit in place.
- Because 28 has 2 tens, which get added into the value of the next column.
- Because every two-digit product must be split evenly between two columns.
- Because 8 is the larger of the two digits in 28, so it moves to the next column.
Round 7,186 to the nearest thousand to estimate 7,186 x 3. What is the estimate?
Which pair of smaller multiplications also equals 7,514 x 3?
- 7,000 x 3, plus 514 x 3
- 7,000 x 4, plus 514 x 3
- 8,000 x 3, plus 514 x 3
- 7,000 x 3, plus 515 x 3
A shipping company loads 2,873 boxes onto each of 7 trucks. How many boxes is that in all?
A student multiplies 8,057 x 8 and gets 6,445. Is that reasonable?
- No, because a product must always be less than 8,057.
- Yes, that product looks about right without checking an estimate.
- No, because you should add 8,057 and 8 instead of multiplying.
- No, because 8,057 x 8 should be about 64,800, not 6,445.
In 5,362 x 6, the thousands digit of 5,362 is 5. What is 5 x 6, plus the carried 2?
Multiply 9,314 x 9 using the standard column algorithm. Line up the digits by place value.