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a fost răspuns

calculeaza e 27:3+ (4 + 12 x 2): 4
42:7 + (84: 4+3 ×9) ×3-72:8
12×9+ (25-5 ×5): 10 - 12 x 9
(99:9 + 23 x 3): 10 + 10:10:1 ​

Răspuns :

Cola167

a) 27:3+(4+24):4

 =27:3+28:4

 =9+7

 =16

b) 42:7 + (84: 4+3 ×9) ×3-72:8

  = 42:7+(21+27)x3-72:8

  = 42:7+48x3-72:8

  = 6+144-9

  = 141

c) 12×9+ (25-5 ×5): 10 - 12 x 9

 = 12x9+ (25-25):10-12x9

 =12x9+0:10-12x9

 = 108+0:10-108

 = 0

d) (99:9 + 23 x 3): 10 + 10:10:1 ​

 = (11+69):10+10:10:1

 =80:10+10:10:1

 =8+1:1

 =8+1

 =9

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