Π‘Π»ΠΎΠΆΠ½ΠΎΡΡΡ Π·Π°Π΄Π°Π½ΠΈΡ Π·Π°ΠΊΠ»ΡΡΠ°Π΅ΡΡΡ Π² ΠΏΡΠ°Π²ΠΈΠ»ΡΠ½ΠΎΠΌ ΠΏΠΎΡΡΠ΄ΠΊΠ΅ Π²ΡΠΏΠΎΠ»Π½Π΅Π½ΠΈΡ Π°ΡΠΈΡΠΌΠ΅ΡΠΈΡΠ΅ΡΠΊΠΈΡ
Π΄Π΅ΠΉΡΡΠ²ΠΈΠΉ: 1) Π΄Π΅ΠΉΡΡΠ²ΠΈΡ Π² ΡΠΊΠΎΠ±ΠΊΠ°Ρ
; 2) Π΄Π΅Π»Π΅Π½ΠΈΠ΅ ΠΈ ΡΠΌΠ½ΠΎΠΆΠ΅Π½ΠΈΠ΅; 3) Π΄ΠΎΠ±Π°Π²Π»Π΅Π½ΠΈΠ΅ ΠΈ Π²ΡΡΠΈΡΠ°Π½ΠΈΠ΅.
1. 27 + 28 + 23 + 12 = (27 + 23) + (28 + 12) = 90;
2. 15 + 16 + 25 + 24 = (15 + 25) + (16 + 24) = 80;
3. 18 + 34 + 12 + 26 = (18 + 12) + (34 + 26) = 90;
4. 32 + 29 + 18 + 11 = (32 + 18) + (29 + 11) = 90;
5. 83 - (64 - 27) = 46;
6. (73 - 56) + (18 + 28) = 63;
7. 90 - 35 + (63 - 45) = 90 - 35 + 18 = 73;
8. 28 + (100 - 77) + 43 = 28 + 23 + 43 = 94.
ΠΡΠ²Π΅Ρ: 90; 80; 90; 90; 46; 63; 73; 94.