Dạng toán : Tính nhanh

Question

a) 1334-218-82

b)41.23+34.41-57

c)3737.43-4343.37

d)3+12+48+...+3072+12288

Answer 1

A,1034 B,2280 C,0 D,73728
 

Answer 2

a) 1334-218-82

= 1334-(218+82)

=1334-300

= 1034

b) 41.23 + 34.41 - 57

= 41.(23+34) - 57

= 41.57 - 57

= 57.(41-1)

= 57.40 = 2280

c) 3737.43 - 4343.37

= 101.37.43 - 43.101.37

= 0

 

Answer 3

a) 1334-218-82

= 1334-(218+82)

=1334-300

= 1034

b) 41.23 + 34.41 - 57

= 41.(23+34) - 57

= 41.57 - 57

= 57.(41-1)

= 57.40 = 2280

c) 3737.43 - 4343.37

= 101.37.43 - 43.101.37

= 0.