The part adder

I used two strategies to solve this question with the part adder 48+49=97

27+21+20+29=97 so the answer is 97                                                                                      

On this strategy I first did 36+12+14=62. Then 62+25=87. 87+10=97.

Week two the part adder

Maths thinking group 7 solved 14+8 and 17+7. We used the part adder to solve thees questions.