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calculeaza grupand convenabil factorii:
8×543×125
2×623×5×10
4×127×5×5


Răspuns :

8 × 543 × 125 = 543 × ( 8 × 125 ) = 543 × 1 000 = 543 000

                            →   folosesc asociativitatea inmultirii

2 × 623 × 5 × 10 = 623 × ( 2 × 5 × 10 ) = 623 × 100 = 62 300

4 × 127 × 5 × 5 = 127 × ( 4 × 5 × 5 ) = 127 × 100 = 12 700