Arrange the following sets of decimals according to their ascending order.
1) 0.6, 0.4, 5.4, 3.2, 1.5 2) 0.7, 1.8, 1.09, 2.1, 2.02 3) 1.5, 2.1, 0.21, 2.03, 1.35
Add up the following decimals: [3 MARKS] 1) 2.1 + 3.7 + 1.2 2) 2.02 + 1.80 3) 1.03+ 7.002