Question

3. Efectuează:
3x3 + 19 - 4 x 4 =
6 x 4 + 3x4-5 =
8 x 53 x 2 + 7 =
5x9-4-3 x 7 =
36:9 + 5 X 8 - 13 =
64:8 + 56 : 8 - 3 =
54:9: 3 + 8 =
72 : 8 x 5 - 4 =​

Answer 1

Explicație pas cu pas:

3x3 + 19 - 4 x 4 = 9 + 19 - 16 = 28 - 16 = 12

6 x 4 + 3x4-5 = 24 + 12 - 5 = 36 - 5 = 31

8 x 53 x 2 + 7 = 424 x2 +7 = 848 + 7 = 855

5x9-4-3 x 7 = 45 - 4 - 21 = 20

36:9 + 5 X 8 - 13 = 4 + 40 - 13 = 31

64:8 + 56 : 8 - 3 = 8 + 7 - 3 = 12

54:9: 3 + 8 = 6: 3 + 8 = 2 +8 =10

72 : 8 x 5 - 4 = 9x5 -1 = 45 - 4 = 41