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             4481     2007-12-21
 

1.356-23-73-27-7=

356-23-73-27-7

=356- 23+7 - 73+27

=356-30-100

=226

2. 125+219+276 - 75+119+176 =

125+219+276 - 75+119+176

=125+219+276-75-119-176

= 125-75 + 219-119 + 276-176

=50+100+100

=250

3.12.5 0.76 0.4 8 2.5=

12.5 0.76 0.4 8 2.5

= 12.5 8 2.5 0.4 0.76

=76

4.3.14 6.5+2.5 3.14+3.14=

3.14 3.14 1

3.14 6.5+2.5 3.14+3.14

=3.14 6.5+2.5+1

=31.4

5.72 11=

46 11=

68 11=

11 10

72 11=792 7+2=9

46 11=506 4+6=10

68 11=748 6+8=14

6.61 81=

1 1

61 81=48 100+14 10+1=4941

7.74 76=

243 247=

1

74 76= 7 8 100+4 6=5624

243 247= 24 25 100+3 7=60021

8.16 18=

1 10

16 18= 16+8 10+6 8=240+48=288

5 1 10 1 25

10.5 19.96+16 1.996+0.34 199.6=

5 19.96+16 1.996+0.34 199.6

=5 19.96+1.6 19.96+3.4 19.96

=19.96 5+1.6+3.4

=199.6

11. 1.25 5.6+2.25 3.6=

5.6 0.7 8 2.25 0.25 9 3.6 0.9 4

1.25 5.6+2.25 3.6

=1.25 8 0.7+0.25 9 0.9 4

=1.25 8 0.7+0.25 4 9 0.9

=10 0.7+8.1

=15.1

=17.6 1.25+36 1.25+26.4 1.25

=1.25 17.6+36+26.4

=1.25 80

=100

13. 969696 999999 323232 33333=

969696 999999 323232 333333

=3 3

=9

14.1999+999 999=

1999 1000+999 999

1999+999 999=1000+999+999 999=1000+ 1+999 999=1000+1000 999=1000 1+999 =1000000

16.999 99 9=

99 100-1 9 10-1

999 99 9

= 1000-1 99 9

= 99000-99 9

=98901 10-1

=989010-98901

=890109

=1996- 199+ +199

=1996-199 9

=1996-199 10-1

=1996-1990+199

=205

19.789 456456-456 789789=

456456 456 1001 789789 789 1001

789 456456-456 789789

=789 456 1001-456 789 1001

=0

976 796+180 795 796-1


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