16 minus 21 is -5
Sixteen.
negative six
Negative twenty nine minus negative twenty one is negative eight.
Twenty five minus one third is 24 and 2/3. You may have also meant twenty five minus one third of twenty five. That would be 16 and 2/3.
Nine hundred sixteen thousand, one hundred twenty-two
-9
Sixteen.
negative six
We convert into like terms giving sixteen twentieths minus five twentieths, giving eleven twentieths.
Negative twenty nine minus negative twenty one is negative eight.
Twenty five minus one third is 24 and 2/3. You may have also meant twenty five minus one third of twenty five. That would be 16 and 2/3.
16
Nine hundred sixteen thousand, one hundred twenty-two
The number 1621 is "one thousand, six hundred twenty-one." Colloquially, it can also be expressed as "sixteen hundred and twenty-one" or just "sixteen twenty-one" if used for a year or a street address.
To do this, first we convert to twenty-eights. That gives us eight twenty-eights minus seven twenty-eights which equals one twenty-eight.
Sixteen and one fourth
1 minus 25/28 is 3/28