a) = 35 x 12 + 65 x 12 + 65 = (35 + 65) x 12+ 65 = 100 x 12 + 65 = 1200 + 65 = 1265
b) tuong tu a
b) (2 + 4 + 6 + ...+ 100) x ( 36 x 3 x 111 - 36 x 3 x 111) = (2 + 4 + 6 + ...+ 100) x 0 = 0
tính nhanh:
a) 2+4+6+8+...........+100
b) 173 x454+206-453x138-110
c) (2+4+6+..........+100)x(36x333-108x111)
d) 136x68+16x272
e) 19991999x1998-19981998x1999
1.Tinh nhanh
a)136x68+16x272
b)(2+4+6+...+100)x(36x333-108x111)
c019991999x1998-19981998x199
Tính nhanh
(2+4+6+...100)x(36x333-108x111)
Tính nhanh
35x12+65x13
(2+4+6+.....100) x( 36x333-108x111)
bài 2 :thực hiện phép tính sau
h,(2+4+6+...+100)X(36x333-108x111)
(2+4+6+...+100)x(36x333-108x111) = ?
( 2+4+6+....+100) X ( 36X333 - 108X111) = ?
tinh nhanh(2+4+6+....+100)x(36x333-108x111)
(2+4+6+8+...+10)x(36x333-108x111)