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1) 4X[60:3+2X(2X7-3)] 2) 1+2X[3+4X(5+6X7)]-8X9 3) 3+10X[362+10X(24+24)] 4) 24+[24+(24:4X4):2] 5) 25+[30:(6X5-25)+1]:7 Compara numerele 87356 si 23548 3 caiete costa 12 lei.Cati lei vor costa 8 caiete? Ofer coroana

Răspuns :

Nitugheorghe57
1)4×[60÷3+2×(2×7-3)]=
4×[60÷3+2×(14-3)]=
4×(60÷3+2×11)==
4×(20+22)=
4×44=176
  
2)1×2×[3+4×(5+6×7)]-8×9=
1×2×[3+4×(5+42)-8×9=
1×2×(3+4×47)-8×9=
1×2×(3+188)-8×9=
2×564-72=
1128-72=1056

3)3+10×[362+10×((24+24)]=
3+10×[362+10×(48)]=
3+10×(362+10×48)=
3+10×(362+480)=
3+10×842=3+8420=8423

4)24+[24+(24÷4×4)÷2]=
24+[24+(24)÷2]=
24+(24+24)÷2=
24+48÷2=
24+24=48

5)25+[30÷(6×5-25)+1]÷7=
25+[30÷(30-25)+1]÷7=
25+(30÷5+1)÷7=
25+7÷7=25+1=26
87356≤235483







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