早教吧作业答案频道 -->其他-->
(2004•无锡)用递等式计算,能简算的简算(1)85×54÷18+745(2)3.4÷[(1.25+0.45)×23](3)35×(1−37)÷512(4)(156×413−26)×811(5)78×1213+78÷13.
题目详情
(2004•无锡)用递等式计算,能简算的简算
(1)85×54÷18+745
(2)3.4÷[(1.25+0.45)×23]
(3)35×(1−
)÷
(4)(156×
−26)×
(5)
×
+
÷13.
(1)85×54÷18+745
(2)3.4÷[(1.25+0.45)×23]
(3)35×(1−
| 3 |
| 7 |
| 5 |
| 12 |
(4)(156×
| 4 |
| 13 |
| 8 |
| 11 |
(5)
| 7 |
| 8 |
| 12 |
| 13 |
| 7 |
| 8 |
▼优质解答
答案和解析
(1)85×54÷18+745
=85×(54÷18)+745,
=85×3+745,
=255+745,
=1000;
(2)3.4÷[(1.25+0.45)×23]
=3.4÷(1.25+0.45)÷23,
=3.4÷1.7÷23,
=2÷23,
=
;
(3)35×(1−
)÷
=35×
÷
,
=20÷
,
=48;
(4)(156×
−26)×
=(48-26)×
,
=22×
,
=16;
(5)
×
+
÷13
=
×
+
×
,
=
×(
+
),
=
.
(1)85×54÷18+745
=85×(54÷18)+745,
=85×3+745,
=255+745,
=1000;
(2)3.4÷[(1.25+0.45)×23]
=3.4÷(1.25+0.45)÷23,
=3.4÷1.7÷23,
=2÷23,
=
| 2 |
| 23 |
(3)35×(1−
| 3 |
| 7 |
| 5 |
| 12 |
=35×
| 4 |
| 7 |
| 5 |
| 12 |
=20÷
| 5 |
| 12 |
=48;
(4)(156×
| 4 |
| 13 |
| 8 |
| 11 |
=(48-26)×
| 8 |
| 11 |
=22×
| 8 |
| 11 |
=16;
(5)
| 7 |
| 8 |
| 12 |
| 13 |
| 7 |
| 8 |
=
| 7 |
| 8 |
| 12 |
| 13 |
| 7 |
| 8 |
| 1 |
| 13 |
=
| 7 |
| 8 |
| 12 |
| 13 |
| 1 |
| 13 |
=
| 7 |
| 8 |
看了(2004•无锡)用递等式计算...的网友还看了以下:
(1)原式=4.25×4×5.24/4+1.52/4×4×2.25=17×1.31+0.38×9= 2020-05-16 …
1+2+3+n=2分之1n(n+1),n是正整数,研究1*2+2*3+你(n+1),观察1*2=3 2020-05-20 …
0.39+1/5+39/100+4/5=1/2-(5/6-3/8)=8/19-6/19+1/107 2020-07-17 …
跪求帮忙解几道VB题目(1)7mod3+3^3/4\5(2)2^(-2\1.5)*16mod3/2 2020-07-17 …
已知1^3=1=1/4*1^2*2^2;1^3+2^3=9=1/4*2^2*3^2;1^3+2^3 2020-07-19 …
因式分解(1)4x^2+4x-1(2)8x^6-27x^3y^6(3)5a-8a^2+42(4)3x 2020-10-31 …
口算六年级1/4*4—1=(2/5+3/5)*14=2/5*14+3/5*14=(1/19—2/9) 2020-11-04 …
直接写出得数.0.5×4÷0.5×4=4.2-4.2×0.5=1.2÷4×1.2÷4=6.3+6.3 2020-11-19 …
高手帮忙解决一道初2数学诡辩题2=3因为4-10=9-15,所以4-10+25/4=9-15+25/ 2020-12-23 …
1、定义新运算用#定义新运算:对于任意的有理数a、b,都有a#b=b^2+1例如:7#4=4^2+1 2021-01-20 …