用递等式计算.(1)2180+540÷18×24(2) 1 5 7 ×(5÷ 5 6 - 5 6
用递等式计算.(1)2180+540÷18×24(2)157×(5÷56-56÷5)(3)415÷[2.5-0.4×(245-1.05)](4)[1-(413-1.75×...
用递等式计算.(1)2180+540÷18×24(2) 1 5 7 ×(5÷ 5 6 - 5 6 ÷5)(3) 4 1 5 ÷[2.5-0.4×( 2 4 5 -1.05)](4)[1-( 4 1 3 -1.75×2)]÷ 2 1 2 .
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稻子XC62
推荐于2016-10-29
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(1)2180+540÷18×24, =2180+30×24, =2180-720, =1460;
(2) 1 ×( 5÷ - ÷5 ), = 1 ×( 6- ÷5 ), = 1 ×( 6- ), = × , =10;
(3) 4 ÷[2.5-0.4×( 2 -1.05)], = 4 ÷[2.5-0.4×1.75], = 4 ÷[2.5-0.7], =4 ÷1.8, = × , = ;
(4)[1-( 4 -1.75×2)]÷ 2 , =[1-( 4 -3.5)]÷ 2 , =[1- ]÷ 2 , = × , = . |
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