Question

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) 3
05x 10:018 - 8) + 55 - 72: (3 + 5) + 15
d) 10 % (25:5 + 5) + 90 - (7 x 4 - 35:5)
e) 20 - (50:5+ 5 x0) x2 + 45 + 6 x 5
f) 4 x 4 + 28:7:2 - (9 x 4:6+8:4)
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Answer 1

Răspuns:

BUNĂ

a)(40:4+3×4+10):8+7×(18-8:8)=

=(10+12+10):8+7×(18-1)

=32:8+7×17

=4+119

=123

b)18:6+(8×5:4-18:3+2)×3=

=3+(40:4-6+2)×3

=3+(10-6+2)×3

=3+6×3

=3+18

=21

c)5x (10:18 - 8) + 55 - 72: (3 + 5) + 15=

=5+55-72:8+15

=5+55-9+15

=60-9+15

=51+15

=66

d)10 × (25:5 + 5) + 90 - (7 x 4 - 35:5)=

=10×(5+5)+90-(28-7)

=10×10+90-21

=100+90-21

=190-21

=169

e)20 - (50:5+ 5 x0) x2 + 45 + 6 x 5=

=20-10×2+45+30

=20-20+75

=0+75

=75

f) 4 x 4 + 28:7:2 - (9 x 4:6+8:4)=

=16+4:2-(36:6+2)

=16+2-(6+2)

=16+2-8

=18-8

=10

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