问题 填空题
在横线里填上“>”、“<”或“=”.
18×4×12______18×(4×12)140-30×2______(140-30)×2
38+262+0______38×262×0358-137-63______358-(137+63)
72÷6÷2______72÷(6×2)(200-25)×4______200-25×4.
答案

(1)18×4×12,

=72×12,

=864;

18×(4×12),

=18×48,

=864;

864=864;

所以18×4×12=18×(4×12).

(2)140-30×2,

=140-60,

=80;

(140-30)×2,

=110×2,

=220;

80<120;

所以:140-30×2<(140-30)×2;

(3)38+262+0=300;

38×262×0=0;

300>0;

所以:38+262+0>38×262×0;

(4)358-137-63,

=221-63,

=158;

358-(137+63),

=358-200,

=158;

158=158;

358-137-63=358-(137+63);

(5)72÷6÷2,

=12÷2,

=6;

72÷(6×2),

=72÷12,

=6;

6=6;

所以:72÷6÷2=72÷(6×2);

(6)(200-25)×4,

=175×4,

=700,

200-25×4,

=200-100,

=100;

700>100;

所以:(200-25)×4>200-25×4.

故答案为:=,<,>,=,=,>.

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