Calculeaza si completeaza:

+ 33 -19 -5 +47 +8 -64

-9 +17 -27 +7 +12

+15 +29

-39 +8 -13

Completeaza tabelele:

+ 15 25 9 17 6 868574439 7

a 45 9 63 38 19 25 8 16 87 76b 8 49 18 7 58 6 63 48 4 16

a+b

a 91 75 56 100 42 83 64 21 95 100b 48 19 37 56 9 8 15 7 47 63

a-b

a 29 48 69 16 9 14b 17 28 39 55

a+b 37 81 90 48 83 72 50 78 82 92

a) 8+

48

b)

- 9 15 26 38 18918472639052