exe.1
a. 0.1+0.1<1, 0.2+0.2 <1, 0.3+0.3 <1, 0.4+0.4 <1, 0.41+0.41 <1
b.0.5+0.5, 0.2+0.8, 0.6+0.4, 0.3+0.7, 0.9+0.1
c. 0.9+0.9, 0.8+0.8, 0.7+0.7, 0.6+0.60, 0.61+0.61
exe 2
8.55 and 2.22, 7.34 and 1.01, 7.35 and 1.02, 7.36 and 1.03, 7.37 and 1.04
exe 3
the two numbers are both decimals less than one. example: 0.01 and 0.1