Nyree Mrs Judd's maths problems

1. 3.4 + 6.7 =10.1

((3+6=9) +(.4+.7=1.1)   

      

2. 12.8 + 9 = 21.8

(12+9=21) + (.8)

3. 23.2 + 38.5 = 61.7

(23+38=61)+(.2+.5)

4. 10 + 0.7 = 10.7

10+.0)+10. +0.7=10.7

5. 47.5 + 61.8 =109.3

47+61=108).5+.8=1.3)

6. 18 + 4.8 =22.8

18+4=22) +.8)

7. 33.5 + 7.6 = 41.1

33+.7=40) .5+.6=1.1)

8. 68 + 12.3 =80.3

68+12=80) +.3)

9. 19.5 + 19.5 =39

19+19=38)+.5+.5=1.0

10. 172 + 17.2 = 189.2

172+17=189) +.2) 189+.2=189.2

11. 23.3 + 4.4 = 27.6

23+4=27) .3+.4)

12. 101 + 110.1 = 211.1

101+110=211) +.1)  211+.1=211.1

SUBTRACTION!!!!!

1. 8.3 - 6.6 = 1.7

(8-2=6)  (.06-.03=.03)

2. 13.7 - 9 =4.7

(13-9=4)  (.07+0.0)

3. 29.9 - 10.5 =19.4

(29-10=19) (.09-.05=.04)

4. 10 - 4.7 = 6.7

(10-4=6) (.07+0.0=.07)

5. 40.4 - 1.9 =39.5

(40-1=39) (.09-.04=.05)

6. 11.6 - 3.8 = 8.2

(11-3=8) (.08-.06=.02)

7. 37.2 - 3.1 =34.1

(37-3=34) (.02-.01=.01)

8. 68.4 - 22.3 =46.1

(60-40=20) (.8-.2=.6) (.04-.03=.01)

9. 30 - 17.5 = 13.5

(30-17=13) (.05-.00=.05)

10. 262 - 26.2 = 236.2

(262-26=236) (.02-.00=.02)

11. 503.3 - 54.4 =449.1

(503-5=449) (.04-.03=.01)

12. 903 - 130.8 = 773.8

(903-130=773) (.08-.00=.08)

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