2*(18.5-3.15)+6.6/(0.75-0.2)和 0.15/2.1*56 12.5/3.6-7/9+8.3/3.6这三道题的简算答案(递等式计算)

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2*(18.5-3.15)+6.6/(0.75-0.2)和0.15/2.1*5612.5/3.6-7/9+8.3/3.6这三道题的简算答案(递等式计算)2*(18.5-3.15)+6.6/(0.75-

2*(18.5-3.15)+6.6/(0.75-0.2)和 0.15/2.1*56 12.5/3.6-7/9+8.3/3.6这三道题的简算答案(递等式计算)
2*(18.5-3.15)+6.6/(0.75-0.2)和 0.15/2.1*56 12.5/3.6-7/9+8.3/3.6这三道题的简算答案(递等式计算)

2*(18.5-3.15)+6.6/(0.75-0.2)和 0.15/2.1*56 12.5/3.6-7/9+8.3/3.6这三道题的简算答案(递等式计算)
2*(18.5-3.15)+6.6/(0.75-0.2)
=2*15.35+6.6/0.55
=30.7+22
=52.7
0.15/2.1*56
=0.15/0.3*56/7
=0.5*8
=4
12.5/3.6-7/9+8.3/3.6
=(12.5-2.8+8.3)/3.6
=18/3.6
=5

2*(18.5-3.15)+6.6/(0.75-0.2)
=2*15.35+6.6/0.55
=30.7+22
=52.7

0.15/2.1*56
=0.15/0.3*56/7
=0.5*8
=4
12.5/3.6-7/9+8.3/3.6
=(12.5-2.8+8.3)/3.6
=18/3.6
=5
全手打的,求采纳。
谢谢

这个 都不会,你读几年级?

计算:2×(18.5-3.15)+6.6÷(0.75-0.2)= 2*(18.5-3.15)+6.6/(0.75-0.2)和 0.15/2.1*56 12.5/3.6-7/9+8.3/3.6这三道题的简算答案(递等式计算) (3.15+2.17+5.61)×(2.17+5.61+6.6)-(3.15+2.17+(3.15+2.17+5.61)×(2.17+5.61+6.6)-(3.15+2.17+5.61+6.6)×(2.17+5.6) (3.15+2.17+5.61)*(2.17+5.61+6.6)—(3.15+2.17+5.61+6.6)*(2.17+5.61) (2+3.15+5.87)*(3.15+5.87+7.32)-(2+3.15+5.87+7.32)*(3.15+5.87)简便算法(分数) 简便计算 (2+3.15+5.87)×(3.15+5.87+7.32)-(2+3.15+5.78+7.32)×(3.15+5.87) (2+3.15+5.87)X(3.15+5.87+7.32)—(2+3.15+5.87+7.32)X(3.15+5.87)要简便 1.(x-3)÷2=7.5 2.3x+x=30 3.15x+x=40 4.2.5x-6=18.5 5.3x+7=59.2 Sgn π ,sng (-π),sgn(0),【3.15】,[-3.15],[-根号2]的函数值,高等数学里的函数与极限中. 简便方法计算:(1/3乘6.6+6.6乘2/3)除以60%=? 2(43°16′-18.5°)等于 (1)6.43+2.58-6.43+2.58(2)6.6*9.8 3.15 2、把下列各数填在相应的集合内:6 ,-3 ,2.5 ,0 ,-1,-|-9| ,-(-3.15) (1)整数集合{ 6 ,-3 ,02、把下列各数填在相应的集合内:6 ,-3 ,2.5 ,0 ,-1,-|-9| ,-(-3.15)(1)整数集合{ …} ;(2)分数集合 (-3.75)+2.85+(-1.25)+(-0.5)+3.15+(-2.5)等于多少?是等于-2吗? 简便计算(-3.75)+2.85+(-1又4分之一)+(-2分之1)+3.15+(-2.5) 用简便方法和递等式计算:(1)2005×18-200.5×90+20050×0.1(2)(0.75×2.6×2.7)÷(0.13×0.25×9)(3)(2+3.15+5.87)×(3.15+5.87+7.32)-(2+3.15+5.87+7.32)×(3.15+5.87) X-18.5*2%=0.15