Find $1.4+2.6$1.4+2.6 giving your answer as a decimal.
Find $2.3+2.1$2.3+2.1 giving your answer as a decimal.
Find $6.3+0.1$6.3+0.1 giving your answer as a decimal.
Find $0.15+0.61$0.15+0.61 giving your answer as a decimal.