在横线上填上“>”“<”或“=”.7.21×0.23______0.721×2.3 0.4+0.4______0.4×0.4 0.25×0....
在横线上填上“>”“<”或“=”.7.21×0.23______0.721×2.30.4+0.4______0.4×0.40.25×0.4______0.78+0.221...
在横线上填上“>”“<”或“=”.7.21×0.23______0.721×2.3 0.4+0.4______0.4×0.4 0.25×0.4______0.78+0.22 1.075×1.01______1.075+1.075×0.01.
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(1)7.21×0.23可改写成0.721×2.3
所以7.21×0.23=0.721×2.3;
(2)0.4+0.4=0.8,0.4×0.4=0.16
所以0.4+0.4>0.4×0.4;
(3)0.25×0.4=0.1,0.78+0.22=1,
所以0.25×0.4<0.78+0.22;
(4)1.075+1.075×0.01
=1.075×1+1.075×0.01
=1.075×(1+0.01)
=1.075×1.01,
所以1.075×1.01=1.075×1+1.075×0.01.
故答案为:=、>、<、=.
所以7.21×0.23=0.721×2.3;
(2)0.4+0.4=0.8,0.4×0.4=0.16
所以0.4+0.4>0.4×0.4;
(3)0.25×0.4=0.1,0.78+0.22=1,
所以0.25×0.4<0.78+0.22;
(4)1.075+1.075×0.01
=1.075×1+1.075×0.01
=1.075×(1+0.01)
=1.075×1.01,
所以1.075×1.01=1.075×1+1.075×0.01.
故答案为:=、>、<、=.
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