Seventy three times seventy-four out of seventy-five-- Seeking--

Seventy three times seventy-four out of seventy-five-- Seeking--

=73×(1-1/75)
=73×1-73×1/75
=73-73/75
=72 and 2 / 75

How to do 25 * 75 * - 25 * 73 simple operation

The distributive law of multiplication by addition
25*75-25*73=25*（75-73）=25*2=50

How to calculate 9.8 * 3.6
How to calculate 9.8 * 3.6 and 7.5 * 1.9 * 0.4???

9.8*3.6
=(10-0.2)×3.6
=36-0.72
=35.28

2 + 4 + 6 + 8. + 2002 (simple calculation)

This is the use of a formula
Sum an arithmetic sequence
Sum = (first item + last item) * number of items / 2
SO 2 + 4 + 6 + 8. + 2002 applies the formula
=(first item + last item) * number of items / 2 = (2 + 2002) * 1000 / 2 = 1003002
The number of terms in this place = (2002-2) / (4-2)