a) 56:4 + 4.(40 – 25) + 2 000:2 – 15.12
= 14 + 4.15 + 1 000 – 180
= 14 + 60 + 1 000 – 180
= 894.
b) 140.(53 – 53:52) – 36:34 – 15.11.(12 – 9)
= 140.(125 – 5) – 32 – 15.11.3
= 140.120 – 9 – 495
= 16 800 – 9 – 495
= 16 296.
c) 784:{300:[536 – (23.3.29 – 174) + 50] + 62}
= 784:{300:[536 – (8.3.29 – 174) + 1] + 36}
= 784:{300:[536 – (696 – 174) + 1] + 36}
= 784:{300:[536 – 522 + 1] + 36}
= 784:{300:15 + 36}
= 784:{20 + 36}
= 784:56
= 14.
d) 34 567 – [4.(73 – 69)3 – 82.(102 – 98)]2
= 34 567 – [4.43 – 82.4]2
= 34 567 – [4.64 – 64.4]2
= 34 567 – [256 – 256]2
= 34 567 – 02
= 34 567.
e) 527 + {[2.(2.23 + 32 + 42 – 52) + 6780]3:332}
= 527 + {[2.(2.8 + 9 + 16 – 25) + 1]3:332}
= 527 + {[2.(16 + 9 + 16 – 25) + 1]3:332}
= 527 + {[2.16 + 1]3:332}
= 527 + {[32 + 1]3:332}
= 527 + {333:332}
= 527 + 33
= 560.
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