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Ex 1 pag6: (CLASA A VI A.
b)624 - 120 +2025:(226 - 17 ori 13 ( Nu am putut pune punctul de ori)
c)145+ 47ori {215 ori 110 - 83 ori (405- 18 ori 16)}
d)512-287+10 ori {15+2 ori 3+(105:15 + (120-5 ori 19) ori 10) ori 2}
( Va rog , Va implor implor ajutatima , Repede daca se poate.






Răspuns :

b)
624 - 120 +2025:(226-17×13)=
= 624-120+2025:(266-221)
= 624-120+2025:45
= 624-120+45
= 504+45
= 549

624 - 120 +2025:(226-17×13) = 549

c)
145+ 47× {215× 110 - 83 × (405- 18×16)}=
=145+47 × [215×110-83×(405-18×16)]
= 145+47×[215×110-83×(405-288)]
= 145+47×(23650-83×117)
= 145+47×(23650-9711)
= 145+47×13939
= 145+655133
= 655278

145+ 47× {215× 110 - 83 × (405- 18×16)}=655278

d)

512-287+10×{15+2×3+[105:15+(120-5×19)×10]×2}
= 512-287+10×{15+6+[7+(120-95)×10]×2}
= 512-287+10×[15+6+(7+25×10)×2]
= 512-287+10×(15+6+257×2)
= 512-287+10 × 535
= 225+5350
= 5575

512-287+10×{15+2×3+[105:15+(120-5×19)×10]×2} = 5575