早教吧作业答案频道 -->其他-->
(1)1.25×17.6+36÷0.8+2.64×12.5(2)9998+998+99+9+6(3)267+123×894894×124−627(4)75×4.67+17.9×2.5(5)1991×199219921992-1992×199119911991(6)12+16+112+120+130.
题目详情
(1)1.25×17.6+36÷0.8+2.64×12.5
(2)9998+998+99+9+6
(3)
(4)75×4.67+17.9×2.5
(5)1991×199219921992-1992×199119911991
(6)
+
+
+
+
.
(2)9998+998+99+9+6
(3)
267+123×894 |
894×124−627 |
(4)75×4.67+17.9×2.5
(5)1991×199219921992-1992×199119911991
(6)
1 |
2 |
1 |
6 |
1 |
12 |
1 |
20 |
1 |
30 |
▼优质解答
答案和解析
(1)1.25×17.6+36÷0.8+2.64×12.5,
=1.25×17.6+36×1.25+26.4×1.25,
=1.25×(17.6+36+26.4),
=1.25×80,
=100;
(2)9998+998+99+9+6,
=(10000-2)+(1000-2)+(100-1)+(10-1)+6,
=(10000+1000+100+10)-(2+2+1+1-6),
=11110-0,
=11110;
(3)
,
=
,
=
,
=
,
=1;
(4)75×4.67+17.9×2.5
=(75÷3)×(4.67×3)+(17.9÷10)×(2.5×10),
=25×14.01+1.79×25,
=25×(14.01+1.79),
=25×15.8,
=395;
(5)1991×199219921992-1992×199119911991,
=1991×199219921992-1992×199119911991,
=1991×1992×100010001-1992×1991×100010001,
=1991×1992×(100010001-100010001),
=1991×1992×0,
=0;
(6)
+
+
+
+
,
=(1-
)+(
-
)+(
-
)+(
-
)+(
-
),
=1-
+
-
+
-
+
-
+
-
,
=1-
,
=
.
=1.25×17.6+36×1.25+26.4×1.25,
=1.25×(17.6+36+26.4),
=1.25×80,
=100;
(2)9998+998+99+9+6,
=(10000-2)+(1000-2)+(100-1)+(10-1)+6,
=(10000+1000+100+10)-(2+2+1+1-6),
=11110-0,
=11110;
(3)
267+123×894 |
894×124−627 |
=
267+123×894 |
894×(123+1)−627 |
=
267+123×894 |
894×123+894×1−627 |
=
267+123×894 |
894×123+267 |
=1;
(4)75×4.67+17.9×2.5
=(75÷3)×(4.67×3)+(17.9÷10)×(2.5×10),
=25×14.01+1.79×25,
=25×(14.01+1.79),
=25×15.8,
=395;
(5)1991×199219921992-1992×199119911991,
=1991×199219921992-1992×199119911991,
=1991×1992×100010001-1992×1991×100010001,
=1991×1992×(100010001-100010001),
=1991×1992×0,
=0;
(6)
1 |
2 |
1 |
6 |
1 |
12 |
1 |
20 |
1 |
30 |
=(1-
1 |
2 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
4 |
1 |
5 |
1 |
5 |
1 |
6 |
=1-
1 |
2 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
4 |
1 |
5 |
1 |
5 |
1 |
6 |
=1-
1 |
6 |
=
5 |
6 |
看了 (1)1.25×17.6+3...的网友还看了以下:
(1)9又6分之5+99又6分之5+999又6分之5+9999又6分之5+3分之2(2)2分之1+ 2020-04-27 …
计算与解方程,能用简便方法计算用简便方法.17.5÷12.5×1.41.58×99+1.5826. 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 …
(3*7+2*9+1*10+1*5+2*8+3*4+1*2+1*9+7*6+9*3+0*7+6*9 2020-07-15 …
帮我解方程(1)27x-4x=34.5(2)3x+2.8=4.3(3)12x-24=6(4)5.8 2020-07-16 …
东门乡去年的棉花产量比前年增加2成,去年的棉花产量是267.6吨,前年的棉花产量是多少吨?1.设前 2020-07-19 …
用递等式计算:2.6×(2.139÷9.3×6.2)16.75-(9.1-1.92)+1.622. 2020-07-19 …
直接写出得数6.3÷9=4.2÷2.1=8-2.6=4×1.5=0.32+0.8=1.7+0.25= 2020-11-19 …
福建行测真题数字推理:2,4,6,9,13,19()选项:A.28B.29C.30D.312+4+6 2020-11-21 …
大家帮帮忙,会数独的都来看看,急求!第一题+=空格+++5++++++++1463+++++2+8+ 2020-11-24 …