1. no, she is not correct....because 1/2 of a small wall is not the same as 1/2 of a large wall. Lets say the small wall is 4 ft....so Sandra painted 1/2*4 = 2 ft...now lets say the lg wall is 8 ft...so Kenneth painted 1/2*8 = 4 ft.
2. 3 3/8 + 4 1/8
3 + 4 = 7
3/8 + 1/8 = 4/8
7 + 4/8 = 7 4/8....so ur answer is 7 4/8
3. 5/10 + 68/100 = 50/100 + 68/100 = 118/100
8/10 + 4/100 = 80/100 + 4/100 = 84/100
3/10 + 16/100 = 30/100 + 16/100 = 46/100
