Tolonga dong jawab sampai no 5 pakai cara

maaf kalau salah.........

1) 78 x 102 = 7.956
2) 134 x 98 = 13.132
3) (26 x 45) + (26 x 55) = 26 x (45 + 55) = 26 x 100 = 2.600
4) (25 x 17) + (25 x 33) = 25 x (17 + 33) = 25 x 50 = 1.250
5) (38 x 8) + (38 x 2) = 38 x (8 + 2) = 38 x 10 = 380