考點:整數(shù)四則混合運算,整數(shù)大小的比較
專題:運算順序及法則
分析:按照運算順序逐一計算得出結(jié)果,進(jìn)一步比較結(jié)果得出答案即可.
解答:
解:(1)36÷3×15
=12×15
=180
36×15÷3
=540÷3
=180
所以36÷3×15=36×15÷3;
(2)450÷5+40×3
=90+120
=210
450÷(5+40)×3
=450÷45×3
=10×3
=30
210>30
所以450÷5+40×3>450÷(5+40)×3;
(3)(160+240÷80)×5
=(160+3)×5
=163×5
=815
(160+240)÷(80×50)
=400÷4000
=0.1
815>0.1
所以(160+240÷80)×5>(160+240)÷(80×50);
(4)(36+15)×100
=51×100
=5100
36×15+100
=540+100
=640
5100>640
所以(36+15)×100>36×15+100.
故答案為:=,>,>,>.
點評:整數(shù)混合運算的關(guān)鍵是抓住運算順序,正確按運算順序計算即可.