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a) b) c)
0,23 8,45 21,34
+ 3,23 - 3,23 + 76,234
----------- ---------- -------------
3,46 5, 22 97,574
d) e) f)
21,09 321,09 9,45
- 2,34 + 45,004 - 7,089
----------- --------------- --------------
18,75 366,094 2,361
Número 9
a) b) c)
35,6 34,002 567,89 : 2,1 = 270,4
x 21,4 x 21,05 - 42 2*21 = 42
------------ ---------------- -----
1424 170010 147
356 34002 -147 7*21= 147
712 68004 --------- 0
------------ ------------------ 89
761,84 715,74210 - 84 4*21= 84
----------
5
======
d) e) f)
0,36 28,56 34,67 : 8,5 = 4,07
x 0.21 x 23
----------- --------------
36 8568
72 5712
----------- --------------
0,0756 656,88