Decimals: Addition and Subtraction.

WALT -  Identify and uses tenths to make numbers

ADDITION:

1. 3.4 + 6.7= 10.1

• ( 3 + 6 = 9)
• (.4 + .7 = 1.1)

2. 12.8 +  9.1= 21.9

• (12 + 9 = 21)
• (.8 + .1 = .9)

3. 23.2 + 35.5 = 58.7

• ( 23 + 35 = 58)
• ( .2 + .5 = .7)

4. 10.1 + 0.7= 10.8

• ( 10 + 0 = 10)
• ( .1 + .7 = .8)

5. 47.5 + 51.4 = 98.9

• (47 + 51 = 98)
• (.5 + .4 = .9)

6. 18 + 4.8 = 22.8

• (18 + 4 = 22)
• (.8)

7. 33.5 + 7.3 = 40.8

• ( 33 + 7 = 40)
• (.5 + .3 = .8)

8. 68 + 11.3 = 79.3

• (68 + 11 = 79)
• (.3)

9. 19.5 + 19.4= 38.9

• ( 19 + 19 = 38)
• (.5 + .4 = .9 )

10. 172 + 17.2= 189.2

• (172 + 17 = 189)
• (.2)

11. 23.3 + 4.4 = 27.7

• (23 + 4= 27)
• (.3 + .4 = .7)

12. 101 + 110.1= 211.1

• (101 + 110= 211)
• (211 + .1 = 211.1)

 SUBTRACTION:

1. 8.3 - 6.6 = 2.3

• ( 8 - 6 =2)
• (0.3 - 0.6=0.3)

2. 13.7 - 9 = 4.7

• (13 - 9= 4)
• (0.7 - 0= 0.7)

3. 29.9 - 10.5 = 19.4

• (29 - 10= 19)
• (0.9 - 0.5 = 0.4)

4. 10 - 4.7= 6.0

• (10 -  4= 6)
• (0.0 - 0.7= 0.0)

5. 40.4 - 1.9= 39.5

• (40 - 1= 39)
• (0.4 - 0.9= 0.5)

6. 11.6 - 3.8= 8.2

• (11 - 3 = 8)
• (0.6 - 0.8= 0.2)

7. 37.2 - 3.1= 34.1

• (37 - 3= 34)
• (0.2 - 0.1= 0.1)

8. 68.4 - 22.3= 46.1

• ( 68 - 22= 46)
• (0.4 - 0.3= 0.1)

9. 30  - 17.5= 12.5

• ( 30 - 17= 13)
• (0.0 -  0.5 )

10. 262 - 26.2=236.2

• (262 - 26= 236)
• (0.0 - 0.2= 0.2)

11. 503.3-54.4 =449.1

• (503 - 54 = 449)
• (0.3 - 0.4= 0.1)

12. 903-130.8 = 773.3

• ( 903 - 130 = 773)
• (0.0 - 0.3 = 0.3) 

 This week our learning intention was to identify the uses of tenths to make numbers, so what we did was to add and subtract decimals to make number or our answer of the question were given. We listed our answers and showed our working out.