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a) 100-10×(7×9-54. b)50+5×(36-6×5) c)62-50:5):2 d)(72::9)×4+9-5

Răspuns :

a)
100-10×(7×9-54)=
100-10×(63-54)=
100-10×9=
100-90=
10


b)
50+5×(36-6×5)=
50+5×(36-30)=
50+5×6=
50+30=
80


c)
62-50:5:2=
62-10:2=
62-5=
57


d)
(72:9)×4+9-5=
8×4+9-5=
32+9-5=
41-5=
36