is 16.7 a reasonable sum for 7.5 + 9.2 explain
7.5 + 9.2= 7.0 + 0.5 + 9.0 + 0.2= 7.0 + 9.0 + 0.5 + 0.2= 16.0 + 0.7= 16.7Yes, it's a reasonable sum - and the calculation above you demonstrates why.