Task 1:

a. 3.25 + 2.09 = 5.34

+ 0.09 -0.09

3.34 + 2.00 = 5.34

b. 4.13 + 1.14 = 5.27

- 0.13 + 0.13

4.00 + 1.27 = 5.27

c. 5.22 + 4.88 = 10.1

- 0.12 + 0.12

5.10 + 4.09 = 10.1

d. 3.08 + 2.03 = 5.11

+ 0.03 -0.03

3.11 + 2.00 = 5.11

e. 6.62 + 3.35 = 9.97

+ 0.35 - 0.35

6.97 + 3.00 = 9.97

f. 2.08 + 1.84 = 3.92

-0.08 +0.08

2.00 + 1.92 = 3.92

g. 3.42 + 1.84 = 6.08

-0.34 +0.34

3.12 + 2.96 = 6.08

New Strategy

h. 5.37 + 4.04 = 9. 41

5. + 4. = 9.

.37 + .04 = 41

i. 8.72 - 4.12 = 4.60

8. - 4. - 4.

.72 - .12 = .60

j. 13.45 - 9.99 = 4.54

13. - 9. = 4.

45 - 99 = .54

k. 8.24 - 4.33 = 4.11

8. - 4. = 4.

.24 - .33 = .11

l. 7.22 - 5.78 = 2.56

7. - 5. = 2.

.22 - .78 = .56

m. 11.01 - 5.93 = 6.92

11. - 5. = 6.

.01 - .93 = .92

n. 6.44 - 2.77 = 4.33

6. - 2. = 4.

.44 - 77. = .33

o. 13.77 - 12.88 = 1.11

13. - 12. = 1.

.77 - .88 = 11

Task 2:

a. 7.63 - 1.77 = 6.14

b. 12.24 - 4.02 = 12.22

c. 16.74 - 5.88 = 11.14

d. 12.34 - 6.59 = 14.25

e. 7.76 - 1.12 = 5.64

f. 14.55 - 3.89 = 12.34

g. 7.03 - 2.99 = 5.96

h. 11.53 - 1.02 = 10.51

i. 6.34 - 2.58 = 4.24

Word Problems:

1. I put 7.63 litres of green dye in a container and 1.89 litres leaked out. How much dye is left? 5.74 litres

7.63 - 1.89 = 5.74

2. Green paint is made from mixing blue and yellow. I made 3.25 litres of green paint. To do this I used 1.22 litres of yellow. How much blue must I have used? 2.03 litres of blue paint.

3,25 - 1.22 = 2.03

3. Jorja has 13.12 metres of thread. She used 5.75 metres of thread. How much thread does she have left?. 12.63 metres left

13.12 - 5.75 = 12.63

4. I put 6.05 litres of water in a pot to boil. After it had boiled for a while I noticed there was only 5.89 litres of water left. How much water must have been evaporated? 1.84 litres

6.05 - 5.89 = 1.84

5. Our fish tank can hold 17.08 litres of water. There is 12.55 litres of water in it the moment. How much more water could we add? 5.53 litres

17.08 - 12.55 = 5.53

6. A chemical factory has a drum which contains 45.75 litres of chemicals. Unfortunately 3.05 litres have escaped. How many litres of chemicals that are left inside of the container? 42.70 litres

45.75 - 3.05 = 42.70

7. Rosa found a dress that she loved. it was $54.20. But it has been reduced by $9.99. How much does the dress cost now? $55.79

54.30 - 9.99 = 55.79

8. I have $75.42. I spent $8.58. How much money do I have left? $73.16

75.42 - 8.58 = 73.16

## No comments:

## Post a Comment

Note: Only a member of this blog may post a comment.