Question

Calculează folosind modelele corespunzătoare.
42 x 20
25 × 40
46 x 30
57 x 30
63 x 20
45 × 20
34 x 26
25 x 25
46 x 18

Answer 1

Răspuns:

42 x 20=42 x 2 x 10=840

25 x 40=25 x 4 x 10=1000

46 x 30=46 x 3 x 10= 1380

57 x 30=57 x 3 x 10=1710

63 x 20=63 x 2 x 10=1260

45 x 20=45 x 2 x 10=900

34 x 26=884

25 x 25=625

46 x 18=828