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递等式计算(写出必要的计算过程,能巧算的要巧算):2700÷540.65+71.8+8.35+9.2143-15.89-84.1113.4+0.5-13.4+0.525×(40+8)×125

题目详情
递等式计算 (写出必要的计算过程,能巧算的要巧算):
2700÷54                      0.65+71.8+8.35+9.2143-15.89-84.11              
13.4+0.5-13.4+0.525×(40+8)×125              7227-2772÷9+803
▼优质解答
答案和解析
(1)2700÷54
=2700÷(27×2)
=2700÷27÷2
=100÷2
=50     

(2)0.65+71.8+8.35+9.2 
=(0.65+8.35)+(71.8+9.2)
=9+81
=90  

(3)143-15.89-84.11
=143-(15.89+84.11)
=143-100
=43 

(4)13.4+0.5-13.4+0.5
=13.4-13.4+(0.5+0.5)
=0+1
=1   
    
(5)25×(40+8)×125
=25×48×125
=(25×6)×(125×8)
=150×1000
=150000

(6)7227-2772÷9+803
=7227-308+803
=6919+803
=7722