Fill in the gaps:

a) 2.5 + 3.9=6.4

-0.1 +0.1

2.4 + 4.0=6.4

b) 4.6 + 1.8=6.4

-0.2 +0.2

4.4 + 2.0=6.4

c) 3.1 + 6.3=9.4

-0.1 +0.1

3.0 + 6.4=9.4

d) 2.8 + 2.5=4.3

+0.2 -0.2

2.0 + 2.3=4.3

e) 4.8 + 6.7=10.5

+0.2 -0.2

4.0 + 6.5=10.5

f) 13.7 + 4.5=17.2

+0.3 -0.3

13.0 + 4.2=17.2

g) 5.8 + 4.6=10.4

+0.2 -0.2

5.0 + 4.4=10.4

h) 9.9 + 4.6=13.5

+0.1 -0.1

9.0 + 4.5=13.5

i) 6.6 + 8.8=14.4

-0.2 +0.2

6.4 + 8.0=14.4

j) 4.2 + 5.8=9.0

-0.2 +0.2

4.0 + 5.0=9.0

k) 7.3 + 7.5=15.4

-0.3 +0.3

7.6 + 7.8=15.4

l) 11.2 + 6.8=17.9

-0.1 +0.1

11.0 + 6.9=17.9

m) 5.8 + 9.3=14.1

+0.2 -0.2

5.0 + 9.1=14.1

n) 7.2 + 8.4=15.6

-0.1 +0.1

7.1 + 8.5=15.6

o) 13.5 + 8.9=21.3

-0.2 +0.1

13.3 + 8.0=21.3

Complete these following activities:

A) 6.5 + 8.1=14.6

B) 9.3 + 7.4=16.7

C) 6.7 + 8.3=15

D) 4.8 + 12.3=17.1

E) 7.7 + 2.6=10.3

F) 12.4 + 12.9=15.3

G) 9.8 + 8.8=18.6

h) 7.3 + 12.4=19.7

I) 15.3 + 3.7=19

Word problem:

A) I have 3.7 metres of rope and I found another 7.8 metres of rope.

How much rope do I have? 10.7

B) Andrew weights 45.6 kilograms and his cat weights 4.8 kilograms. How much do they both weigh in total? 50.4

C) Sarah was 1.3 metres tall but she has grown another 0.3 metres this year. How tall is she now? 1.6

D) An electrician has completed 14.4 metres of wiring in a house. He must still do another 13.6 metres of wiring. How much wiring does the house require in total? 28

E) A designer uses 4.6 metres of blue fabric and 12.3 metres of red fabric. How much fabric has she used in total? 16.9

F) To create a long red carpet two carpet are placed together. One is 12.2 metres long and the other is 14.5 metres long. How long is the red carpet in total? 26.7

G) My car has 33.4 liters of petrol in it. I add another 7.5 liters of petrol. How much petrol is in my car now? 40.9

H) Sue drank 1.6 litres of water and another 1.3 liters this afternoon. How much water has she drank? 2.9

I) A paddling pool had 37.3 liters of water in it. I added another 19.8 liters of water. How much water is in it now? 47.1

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