Explicație pas cu pas:
[tex]31 \times 14 + 14 \times 69 = 14(31 + 69) = 14 \times 100 = 1400[/tex]
[tex]5 + 5 \times 79 = 5 + 395 = 400[/tex]
[tex]50 + 50 \times 99 = 50(1 + 99) = 50 \times 100 = 5000[/tex]
[tex]199 \times 72 + 72 = 72(199 + 1) = 72 \times 200 = 14400[/tex]
[tex]27 \times 24 + 24 \times 56 + 24 = 24(27 + 56 + 1) = 24 \times 84 = 2016[/tex]
