Question

please help me, my Assignment

Answer 1

7
see 2.25(21/4)+0.25+ 0.25+0.25=3
3+0.25+0.25+0.25+0.25=4

Answer 2

2 1/4 + n 1/4 = 4
9/4+n/4 = 4
(n+9)/4 = 4
n+9 = 16
n = 7
Hence 7 1/4 's needed to be added to 2 1/4 to make 4