
First, express the mixed numbers as simple fractions:
1 3/5 = (1x5+3)/5 = 8/5
1 9/10= (10x1+9)/10 = 19/10
Add both:

The sum is greater than 3 and less than 4.
40+60 is 100 if that’s what you’re asking
(7/8)*(9/10)=7*9/(8*10)=63/80
Answer:
-48
Step-by-step explanation:
Multiply all numbers to get -48