Let's solve the expression step-by-step:
First, we need to evaluate the expressions inside the brackets.
Calculate 18 × 5 : 18 × 5 = 90
Calculate 5 × 20 : 5 × 20 = 100
Add the results from the above calculations: 90 + 100 = 190
Now that we've evaluated the expression inside the brackets, we subtract this from 400:
Subtract 190 from 400 : 400 − 190 = 210
So, the expression 400 − [( 18 × 5 ) + ( 5 × 20 )] equals 210 .