56
One method is (10×4)+(5×3) = 55 (or mentally add up from left to right).
It is: (5+2)*10 = 70
It is: (2+10) times 5 = 60
-3
25
2x2 + 9x + 10
10 + 10 + 10 + 5 + 5 +1 = 41.
(10 + 1) times 5 = 11 x 5 = 55
3 times 6 is 18 2 times 5 is 10 18 plus 10 is 28
here's how I solved it( * stans for multiply): 4*1000+5*100+6*10+1*10+2*110= First you do all the multiplication,and get: 4,000+500+60+10+220= then you add, and the answer is 4790.
The correct answer to what is 510 plus 5 is 515. Five times 103 also equals 515.
6*34+10-5=209