(1)0.4-(-4/1)+6/1(2)3/1-(-6/5)+3/2(3)3/1+(-5/1)+1+3/2(4)27-18+(-7)-32(5)0.5+(-4/1)-(2.75)+2/1(6)33.1-(-22.9)+(-10.5)(7)(-8)-(-15)+(-9)-(-12)(8)-3/2+(-6/1)-(-4/1)-2/

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/13 04:02:32

(1)0.4-(-4/1)+6/1(2)3/1-(-6/5)+3/2(3)3/1+(-5/1)+1+3/2(4)27-18+(-7)-32(5)0.5+(-4/1)-(2.75)+2/1(6)33.1-(-22.9)+(-10.5)(7)(-8)-(-15)+(-9)-(-12)(8)-3/2+(-6/1)-(-4/1)-2/
(1)0.4-(-4/1)+6/1(2)3/1-(-6/5)+3/2(3)3/1+(-5/1)+1+3/2(4)27-18+(-7)-32
(5)0.5+(-4/1)-(2.75)+2/1(6)33.1-(-22.9)+(-10.5)(7)(-8)-(-15)+(-9)-(-12)(8)-3/2+(-6/1)-(-4/1)-2/1(9)5/3-2/3+(-4/11)+4/13

(1)0.4-(-4/1)+6/1(2)3/1-(-6/5)+3/2(3)3/1+(-5/1)+1+3/2(4)27-18+(-7)-32(5)0.5+(-4/1)-(2.75)+2/1(6)33.1-(-22.9)+(-10.5)(7)(-8)-(-15)+(-9)-(-12)(8)-3/2+(-6/1)-(-4/1)-2/
(1)0.4-(-4/1)+6/1
=0.4+1/4+1/6
=24/60+15/60+10/60
=49/60 (六十分之四十九)
(2)3/1-(-6/5)+3/2
=1/3+5/6+2/3
=2/6+5/6+4/6
=11/6(六分之十一)
(3)3/1+(-5/1)+1+3/2
=1/3-1/5+1+2/3
=5/15-3/15+15/15+10/15
=27/15(十五分之二十七)
(4)27-18+(-7)-32
=27-18-7-32
=-30
(5)0.5+(-4/1)-(2.75)+2/1
=0.5-0.25-2.75+0.5
=-2
(6)33.1-(-22.9)+(-10.5)
=33.1+22.9-10.5
=45.5
(7)(-8)-(-15)+(-9)-(-12)
=-8+15-9+12
=10
(8)-3/2+(-6/1)-(-4/1)-2/1
=-2/3-1/6+1/4-1/2
=-8/12-2/12+3/12-6/12
=-13/12(负十二分之十三)
(9)5/3-2/3+(-4/11)+4/13
=3/5-3/2-11/4+13/4
=12/20-30/20-55/20+65/20
=-8/20
=-2/5(负五分之二)

(1)0.4-(-4/1)+6/1
=0.4+4/1+6/1
=5/2+12/3+12/2
=5/2+12/5
=60/24+60/25
=60/49
(2)3/1-(-6/5)+3/2
=3/1+6/5+3/2
=6/2+6/5+6/4
=6/11
(3)3/1+(-5/1)+1+3/2
=6/1-5/1+1...

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(1)0.4-(-4/1)+6/1
=0.4+4/1+6/1
=5/2+12/3+12/2
=5/2+12/5
=60/24+60/25
=60/49
(2)3/1-(-6/5)+3/2
=3/1+6/5+3/2
=6/2+6/5+6/4
=6/11
(3)3/1+(-5/1)+1+3/2
=6/1-5/1+1+3/2
=30/5-30/6+30/30+30/20
=30/49
(4)27-18+(-7)-32
=27-18-7-32
=9-7-32
=2-32
=-30
(5)0.5+(-4/1)-(2.75)+2/1
=0.5-4/1-2.75+2/1
=0.5-0.25-2.75+0.5
=(0.5+0.5)-(0.25+2.75)
=1-3
=-2
(6)33.1-(-22.9)+(-10.5)
=33.1+22.9-10.5
=56-10.5
=45.5
(7)(-8)-(-15)+(-9)-(-12)
=-8+15-9+12
=7-9+12
=-2+12
=10
(8)-3/2+(-6/1)-(-4/1)-2/1
=-3/2-6/1+4/1-2/1
=-12/8-12/2+12/3-12/6
=12/(-8-2+3-6)
=-12/13
(9)5/3-2/3+(-4/11)+4/13
=5/3-2/3-4/11+4/13
=5/3-2/3-(4/11-4/13)
=5/3-2/3-4/2
=5/3-(2/3+2/1)
=5/3-2
=5/3-5/10
=-5/7

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题目里面的算式答案是156.1
内容里面的是9709363/8580

18÷{1-{0.4+(1-0.4)}*0.4= 1÷(6/1-3/1)*6/1= -3-{4-(4-3.5*3/1)}*{-2+(-3)}=急 初中有理数加减混合运算1.计算: (1)-2.5+(-1/5) (2) 0.4-(-1/4)+1/6 (3)1/3-(-5/6)+2/3 (4) 1/3+(-1/5)+1+2/3 (5)27-18+(-7)-32 (6)0.5+(-1/4)-(-2.75)+1/2 2.计算: (1)33.1-(-22.9)+( (1)0.4-(-4/1)+6/1(2)3/1-(-6/5)+3/2(3)3/1+(-5/1)+1+3/2(4)27-18+(-7)-32(5)0.5+(-4/1)-(2.75)+2/1(6)33.1-(-22.9)+(-10.5)(7)(-8)-(-15)+(-9)-(-12)(8)-3/2+(-6/1)-(-4/1)-2/ 计算(1)-2.5+(-1/5); (2)0.4-(-1/4)+1/6(2)1/3-(-5/6)+2/3; (4)1/3+(-1/5)+1+2/3;(5)27-18+(-7)-32; (6)0.5+(-1/4)-(-2.75)+1/2 (1)0.3,0.4,0.5;(2)6,8,10;(3)4,5,6;(4)3/5,4/5,1;是勾股数的有几组? -1/2+(-1/6)-(-1/4)-2/3 (2/1-4/1)+(4/1-6/1)+(6/1-8/1)+.+(48/1-50/1) 计算:(1)8+(-12)= (2)(-0.4)+0.4= (3)(-5)+0= (4)5.7+计算:(1)8+(-12)=(2)(-0.4)+0.4=(3)(-5)+0=(4)5.7+(-2.1)=(5)2+(-3/1)=(6)(-2╱3)+(-1.5)= (1+2/1)(1+4/1)(1+6/1).(1+10/)(1-3/1)(1—5/1).(1-9/1) 探索规律.(1).1,2,3,5,(),(),34.(2).1,2,4,7,11,(),().(3).1,4,9,16,(),().(4).(8,12),(6,14),(11,9),,15)(5).16,4,1,1/4,(),().(6).1/5,0.4,3/5,0.8,(),().(7).7,5,14,4,21,3, 添上运算符号和括号,使等式成立(1)0.1 0.2 0.3 0.4 0.5=0(2)0.1 0.2 0.3 0.4 0.5=1(3)0.1 0.2 0.3 0.4 0.5=2(4)0.1 0.2 0.3 0.4 0.5=3(5)0.1 0.2 0.3 0.4 0.5=4(6)0.1 0.2 0.3 0.4 0.5=5 1、16,4,1,1/4,(),()2、1/5,0.4,3/5,0.8,(),()3、7,5,14,4,21,3,(),() 几道数学题,得到正解给100(1-1/6+3/44)*(-48)-2+1/2/(-2)(-7/30)/(3/5-1/6-2/3)(8-1又1/3-0.4)/(-4/3)(-24)/(-2又2/3)+(-4又1/5)*10(-1又2/3)*(-7/2)/(-5/4)第一题打错了 应该是(1-1/6+3 (1/2+1/3+1/4+1/6)*24 最适合用加法运算定律的是( ) a 0.4+.75+1 b 2/3+(-2.5) c (-6)+(-6.5)+(-4)+(-3.5)d 3.5+(-0.875)+(-4又1/3)+(-0.08) (-36)÷(-2) 3/7÷(-6/7) 0÷0.4 (-6)÷(-6/1) (1)23-17-(-7)+(-16)(2)-2分之1-5又5分之1-1+3又4分之-4.5+2又3分之1(3)(-2.5)-(+2.7)-(-1.6)-(-2.7)+(+2.4)(4)0.4-(-4分之1)+6分之1(5)3分之1+(-6分之5)+3分之2(6)27-18+(-7)-3 5分之x-6分之x=0.4 3(x+2)=4(x+1) 0.3=2x-1分之x+1