问题 填空题
在横线里填“>”“<”或“=”.
27+19×8______(27+19)×883-47-28______83-(47-28)
450÷3×2______450÷(3×2)66×31×54______31×(54×66)
答案

(1)27+19×8,

=27+152,

=179;

(27+19)×8,

=46×8,

=368;

179<368,

所以,27+19×8<(27+19)×8.

(2)83-47-28,

=36-28,

=8;

83-(47-28),

=83-19,

=64;

8<64,

所以,83-47-28<83-(47-28).

(3)450÷3×2,

=150×2,

=300;

450÷(3×2),

=450÷6,

=75;

300>75,

所以,450÷3×2>450÷(3×2).

(4)66×31×54,

=2046×54,

=110484;

31×(54×66),

=31×3564,

=110484.

110484=110484,

所以,66×31×54=31×(54×66).

故答案为:<,<,>,=.

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