Find $0.3+0.4$0.3+0.4 giving your answer as a decimal.

Find $0.6+0.4$0.6+0.4 giving your answer as a decimal.

Find $0.9+0.9$0.9+0.9 giving your answer as a decimal.

Find $0.7+0.7$0.7+0.7 giving your answer as a decimal.