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Efectueaza intai operatile de ordinul al doilea,apoi pe cele de ordinul intai.a)7×2+18:3 ,9:3+8×9,8×7-36:4b)27+27:3 ,72-72:8,49+7×7 c)34+16:4-19 ,62-81:9-38,7×9+54:6​

Răspuns :

a)

7×2+18:3=

14+6=

=20

9:3+8×9=

3+72=

=75

8×7-36:4=

56-9=

=47

b)

27+27:3=

27+9=

=36

72-72:8=

72-9=

=63

49+7×7=

49+49=

=98

c)

34+16:4-19=

34+4-19=

38-19=

=19

62-81:9-38=

62-9-38=

53-38=

=15

7×9+54:6=

63+9=

=72

a) 7×2+18:3=14+6=20 ;
9:3+8×9=3+72=75;
8×7-36:4=56-9=47;
b) 27+27:3=27+9=36;
72-72:8=72-9=63;
49+7×7=49+49=98;
c) 34+16:4-19=34+4-19=38-19=19;
62-81:9-38=62-9-38=53-38=15;
7×9+54:6=63+9=72