Question

[Hồ Hạ Vy]

Tính nhanh:

a, 35x 34+35x 38 + 65x 75+ 65x 45

b, 36x 28 + 36x 82 + 64x 69 + 64 x41

c, 254x 399 - 145/ 254+ 399 x 253

Answer 1

[Nguyễn Ngọc Mai Khanh]

a, 35x 34+35x 38 + 65x 75+ 65x 45=10437

b, 36x 28 + 36x 82 + 64x 69 + 64 x41=11000

c, 254x 399 - 145/ 254+ 399 x 253=202292,4291