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298. Efectuează.
a) (40:4+ 3 x 4 + 10):8 + 7 x (18-8:8)
b) 18:6 + (8 x 5:4 - 18:3+2) x 3
c) 5x 10: (18-8) + 55 - 72: (3 + 5) + 15

Răspuns :

Lauradenisa48ask

Răspuns:

a) (10+12+10):8+7×17=32:8+119=123

b) 3+(10-18+3+2)×3=3-3×3=3-9= -6

c) 5×10:10+55-72:8+15=5×1+55-9+15=5+55-9+15=66

Hanganuranyaask

Răspuns:

a=123 b=21 c=66 Succes!

Explicație pas cu pas:

a)(40:4+3×4+10):8+7×(18-8:8)

=(10+12+10):8+7×(18-1)

=(22+10):8+7×17

=32:8+7×17=

=4+119=123

b)18:6+(8×5:4-18:3+2)×3=

=18:6+(40:4-6+2)×3=

=18:6+(10-6+2)×3=

=18:6+(4+2)×3=

=18:6+6×3=

=3+18=21

c) 5×10:(18-8)+55-72:(3+5)+15=

=5×10:10+55-72:8+15=

=50:10+55-9+15=

=5+55-9+15=

=60-9+15=

=51+15=66

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