Question

Calculează:
a) 3+3 x [3+3:3x (3 + 3 x 3)] : 15
b) 812 - 4 [6 x (61 – 3 600 : 12:30)] : 9
c) [214 + 240 : (16 – 2 x 5)] x 25 – 25 : 25
d) 90+ 7 x (1 614 - 12 000 : (18-10)] - 16
e) 44 + 8 x [280 : (37 - 1480 : 20:37)]: 32-7
f) (18 * 8 +56): [50 x 40: (220 - 2 x 60)]
Va dau corana ​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

3+3 x [3+3 : 3 x (3 + 3 x 3)] : 15 = 6

= 3+3 x [3+ 1 x (3 + 9)] : 15 =

= 3 + 3 x ( 3 + 1 × 12 ) : 15 =

= 3 + 3× 15 : 15 =

= 3 + 45 : 15 =

= 3 + 3 =

= 6

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b)

812 - 4× [6 x (61 – 3 600 : 12:30)] : 9 = 676

=812 - 4 x[6 x (61 – 300:30)] : 9 =

= 812 - 4 x[6 x (61 – 10)] : 9 =

= 812 - 4 × ( 6 × 51 ) : 9 =

= 812 - 4 × 306 : 9 =

= 812 - 1 224 : 9 =

= 812 - 136 =

= 676

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c)

[214 + 240 : (16 – 2 x 5)] x 25 – 25 : 25 = 6 349

= [214 + 240 : (16 – 10)] x 25 – 1 =

= ( 214 + 240 : 6 ) × 25 - 1 =

= ( 214 + 40 ) x 25 - 1 =

= 254 × 25 - 1 =

= 6 350 - 1 =

= 6 349

_______________________________

d)

90+ 7 x (1 614 - 12 000 : (18-10)] - 16 = 872

= 90 + 7 × ( 1 614 - 12 000 : 8 ) - 16 =

= 90 + 7 × ( 1 614 - 1 500 ) - 16 =

= 90 + 7 × 114 - 16 =

= 90 + 798 - 16 =

= 888 - 16 =

= 872

_______________________________

e)

44 + 8 x [280 : (37 - 1480 : 20:37)]: 32-7 = 39

= 44 + 8 x [280 : (37 - 74 : 37)]: 32-7 =

=  44 + 8 x [280 : (37 - 2)]: 32-7 =

= 44 + 8 × ( 280 : 35 ) : 32 - 7 =

= 44 + 8 × 8 : 32 - 7 =

= 44 + 64 : 32 - 7 =

= 44 + 2 - 7 =

= 46 - 7 =

= 39

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f)

(18 × 8 +56) : [50 x 40 : (220 - 2 x 60)] = 10

= (144 +56) : [2 000 : (220 - 120)] =

= 200 : ( 2 000 : 100) =

= 200 : 20 =

= 10