10 + 10 + 10 + 5 + 5 +1 = 41.
One method is (10×4)+(5×3) = 55 (or mentally add up from left to right).
30 + 10 + 5 + 5 = 50
5+5=10 5+5=10 10+10+5=25 so the answer is not 20, it is 25 or 5*5
25 as 10+10 is 20 plus 5 is 25
165
true
5 plus 5 would equal 10
25
-5 + 10 = 5
-10 + 5 = -5
20 + 10 + 5 = 35