在横线里填上“>”“<”或“=”.41×15______40×15+15 30×(16+28)______3...
在横线里填上“>”“<”或“=”.41×15______40×15+1530×(16+28)______30×16+2825×16×125______(25×2)×(12...
在横线里填上“>”“<”或“=”.41×15______40×15+15 30×(16+28)______30×16+2825×16×125______(25×2)×(125×8)54×99______54×100640-55-45______640-(55-45)168÷7÷8______168÷7×8.
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(1)41×15=615;
40×15+15
=600+15
=615;
所以,41×15=40×15+15;
(2)30×(16+28)
=30×44
=1320;
30×16+28
=480+28
=508;
1320>508;
所以,30×(16+28)>30×16+28;
(3)悔掘25×16×125
=25×(4×4)×125
=(25×4)×(4×125)
=100×500
=50000;
(25×2)×(125×8)
=50×1000
=50000;
所以穗前饥,25×16×125=(25×2)×(125×8);
(4)54×99=5346,54×100=5400,5346<5400;
所以,54×99<54×100;
(5)640-55-45
=640-(55+45)
=640-100
=540;
640-(55-45)
=640-10
=630;
540<630;
所以,640-55-45<640-(55-45);
(6)168÷7÷8
=24÷8
=3;
168÷7×8
=24×8
=192;
3<192;
所以,猜返168÷7÷8<168÷7×8.
故答案为:=,>,=,<,<,<.
40×15+15
=600+15
=615;
所以,41×15=40×15+15;
(2)30×(16+28)
=30×44
=1320;
30×16+28
=480+28
=508;
1320>508;
所以,30×(16+28)>30×16+28;
(3)悔掘25×16×125
=25×(4×4)×125
=(25×4)×(4×125)
=100×500
=50000;
(25×2)×(125×8)
=50×1000
=50000;
所以穗前饥,25×16×125=(25×2)×(125×8);
(4)54×99=5346,54×100=5400,5346<5400;
所以,54×99<54×100;
(5)640-55-45
=640-(55+45)
=640-100
=540;
640-(55-45)
=640-10
=630;
540<630;
所以,640-55-45<640-(55-45);
(6)168÷7÷8
=24÷8
=3;
168÷7×8
=24×8
=192;
3<192;
所以,猜返168÷7÷8<168÷7×8.
故答案为:=,>,=,<,<,<.
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