Presentacio mate tema 2
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The document discusses basic mathematical operations with natural numbers such as addition, subtraction, multiplication, and division. It explains key properties and concepts for each operation, including commutativity and associativity for addition and multiplication. Examples are provided for performing operations without calculators, including 32000x1234000 and 123:0.5. The importance of order of operations with parentheses, multiplication/division, then addition/subtraction is emphasized.
Presentacio mate tema 2
- 1. TEMA 2 OPERACIONS AMB NOMBRES NATURALS FACTORS EN UNA ADDICI: 12+3= 15 (SUMANDS) (SUMA O RESULTAT) FACTORS EN UNA SUBSTRACCI 12 - 3 = 9 (MINUEND) (SUBSTRAENT) (DIFERNCIA) PROPIETATS DE LA SUMA COMMUTATIVA: A+B=B+A L'ORDRE DELS FACTORS NO ALTERA EL RESULTAT ASSOCIATIVA: A+(B+C)=(A+B)+C
- 2. MULTIPLICACI T LES PROPIETATS DE LA SUMA QUINES SN? MULTIPLICAR S SUMAR MOLTES VEGADES? I PER A QUE SERVEIX? FEU LA SEGENT MULTIPLICACI SENSE POSAR ELS ZEROS COM A MULTIPLICANTS 32000x1234000 FACTORS DE LA MULTIPLICACI 23 x 10 = 230 (MULTIPLICANTS) (PRODUCTE) DIVISI DIVIDIR = REPARTIR? FEU LA SEGENT DIVISI SENSE CALCULADORA 123:0,5=
- 3. OPERACIONS COMBINADES ORDRE DE LES OPERACIONS: 1R PARNTESI 2N MULTIPLICACIONS I DIVISIONS 3R SUMES I RESTES ARA A FER-LES TU 24+20:2x5 (24+20):2x5 24+(20:2)x5