Question

561 x 5 x 2 = 561 x (5 x 2)= 561 X 10 = 5 610
5 Grupează convenabil factorii pentru a calcula rapid.
2x798 x5

5 x 996x2

4 x 75 x 25

25 x 4 x 84

2 x 783 x 5

5×996×2 ​

Answer 1

2 × 798 × 5 = 798 × ( 5 × 2 ) = 798 × 10 = 7980

5 × 996 × 2 = 996 × ( 2 × 5 ) = 996 × 10 = 9.960

4 × 75 × 25 = 75 × ( 25 × 4 ) = 75 × 100 = 7.500

25 × 4 × 84 = 84 × ( 25 × 4 ) = 84 × 100 = 8.400

2 × 783 × 5 = 783 × ( 5 × 2 ) = 783 × 10 = 7.830

5 × 996 × 2 = 996 × ( 2 × 5 ) = 996 × 10 = 9.960