脱式计算.(能简算得要简算.)659-4.8-5.2+749(0.11×537+0.11×247)×4120.8×194-80%×947.2×3.6-7.2×0.641×102.
脱式计算.(能简算得要简算.)
6-4.8-5.2+7
(0.11×5+0.11×2)×4
0.8×-80%×
7.2×3.6-7.2×0.6
41×102.
答案和解析
(1)6
-4.8-5.2+7
=(6+7)-(4.8+5.2)
=14-10
=4
(2)(0.11×5+0.11×2)×4
=0.11×(5+2)×4
=0.11×8×
=3.96
(3)0.8×-80%×
=0.8×-0.8×
=0.8×(-)
=0.8×
=2
(4)7.2×3.6-7.2×0.6
=7.2×(3.6-0.6)
=7.2×3
=21.6
(5)41×102
=41×(100+2)
=41×100+41×2
=4100+82
=4182
-(-89)+|-87|-23+[-75-(7)+76]-(10+39-24)|-9.8|+(-4 2020-04-07 …
BP神经网络高手来5.1,3.5,1.4,0.2,Iris-setosa4.9,3.0,1.4,0 2020-05-17 …
帮我破解下这串数字什么意思9(2)4(3)6(2)2(1)4(3)3(1)4(3)9(1)6(3) 2020-05-17 …
急!谁能求sin^4(x)的原函数?要过程.已知:F'(x)=sin^4(x)求:F(x)能否解释 2020-05-22 …
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)5+21*8/2 2020-07-17 …
简便运算(有追加分能简算就简算(要过程)1)9/10*2/3*1/42)3/8÷(3/10*5/6 2020-07-19 …
8/15+2/3-3/4(/代表分数线)(2/3+2/15)×45(4/5+1/4)除以7/3+7 2020-07-19 …
口算:5.6+3.4=10-2.7=2.8+3.3=1.2×0.8=10÷2.5=8×1.25=3 2020-07-19 …
12=1/6*1*2*3=1;12+22=1/6*2*3*5=5;12+22+32=1/6*3*4 2020-07-22 …
求助JS二维数组从N个项取M个进行排列的组合算法函数如数组:arr1=[[1,2,3],[3,6], 2020-11-18 …