我准备要升初中了,求一些有理数加减法的练习题,不要那些什么交换律,结合律的啊,练习题不是应用题哦,是计算那种,最好有答案啦,有答案的追加分,拜托各位了,谢谢!!
不要密密麻麻的,30题左右就够了,谢谢了!! 对了,希望各位哥哥姐姐能告诉我一些学好初中数学的秘诀啊 。
下面的茺葶晚盈,我是要口算题吖!
-13×三分之二-0.34×七分之二+三分之一×(-13)-七分之五*0.34
=-13×2/3 -0.34×2/7 -13×1/3 -5/7 ×0.34
=-13×(2/3+1/3) -0.34×(2/7+5/7)
=-13×1 -0.34×1
=-13.34
(2×3×4×5)×(二分之一-三分之一-四分之一+五分之一)
=(2×3×4×5)×(1/2-1/3 -1/4 +1/5)
=(2×3×4×5)×(1/2)-(2×3×4×5)×(1/3)-(2×3×4×5)×(1/4)+(2×3×4×5)×(1/5)
=3×4×5-2×4×5-2×3×5+2×3×4
=60-40-30+24
=14
-1.57×(+21.8)+6.28×(-24.7)-3.14×39.7
=-1.57×21.8 +1.57×4×(-24.7) -1.57×2×39.7=-1.57(21.8+4×24.7+2×39.7)
=-1.57×200
=-314
=-13×2/3 -0.34×2/7 -13×1/3 -5/7 ×0.34
=-13×(2/3+1/3) -0.34×(2/7+5/7)
=-13×1 -0.34×1
=-13.34
(2×3×4×5)×(二分之一-三分之一-四分之一+五分之一)
=(2×3×4×5)×(1/2-1/3 -1/4 +1/5)
=(2×3×4×5)×(1/2)-(2×3×4×5)×(1/3)-(2×3×4×5)×(1/4)+(2×3×4×5)×(1/5)
=3×4×5-2×4×5-2×3×5+2×3×4
=60-40-30+24
=14
-1.57×(+21.8)+6.28×(-24.7)-3.14×39.7
=-1.57×21.8 +1.57×4×(-24.7) -1.57×2×39.7=-1.57(21.8+4×24.7+2×39.7)
=-1.57×200
=-314
温馨提示:答案为网友推荐,仅供参考
第1个回答 2010-07-13
-38)+52+118+(-62)= -100+170=70
抱歉,题有点少,但答案都是一步步算出来的
12+35+(-23)+0= 47-23=24
(-6)+8+(-4)+12 = 10
27+(-26)+33+(-27)=33-26=7
39+[-23]+0+[-16]= 39-39=0
[-18]+29+[-52]+60= 19
[-3]+[-2]+[-1]+0+1+2= -3
[-301]+125+301+[-75]= 125-75=40
(-7分之1)+(-7分之2)+1又7分之3 =1
-0.5-(-3 )+2.75-(+7 )2.75-10.5=-7.75
39+[-23]+0+[-16]= 0
[-18]+[-52]+60= -10
[-3]+[-2]+[-1]+0+1+2= -3
抱歉,题有点少,但答案都是一步步算出来的
12+35+(-23)+0= 47-23=24
(-6)+8+(-4)+12 = 10
27+(-26)+33+(-27)=33-26=7
39+[-23]+0+[-16]= 39-39=0
[-18]+29+[-52]+60= 19
[-3]+[-2]+[-1]+0+1+2= -3
[-301]+125+301+[-75]= 125-75=40
(-7分之1)+(-7分之2)+1又7分之3 =1
-0.5-(-3 )+2.75-(+7 )2.75-10.5=-7.75
39+[-23]+0+[-16]= 0
[-18]+[-52]+60= -10
[-3]+[-2]+[-1]+0+1+2= -3
第2个回答 2010-07-12
-38)+52+118+(-62)=
(-32)+68+(-29)+(-68)=
(-21)+251+21+(-151)=
12+35+(-23)+0=
(-6)+8+(-4)+12 =
27+(-26)+33+(-27)
12+35+(-23)+0=
39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+[+3/4]+[-1/4]=
[-7/2]+[+5/6]+[-0.5]+4/5+19/6=
[-26.54]+[-6.14]+18.54+6.14=
1.125+[-17/5]+[-1/8]+[-0.6]=
1-4/9 =
1-7/10=
8/15-5=
7-15=
2/8-5/8=
8/27-5 =
4-27 =
11/12-10/12=
16/21-1/7 =
4/ 2-(3+3 )=
1/3- 7/12-7/18=
1 -1/3-1 1/5 =
10-7/10=
5/24+3/8 =
4.5-3/5
1-3/5=2/5
4.39*1/13*2/3
1+(-2)+(-3)+4+5+(-6)+(-7)+8+9+(-10)+(-11)+12
-15.8+13又6分之5+15又5分之4
(-7分之1)+(-7分之2)+1又7分之3
-0.5-(-3 )+2.75-(+7 )
学数学的秘籍就是多思考,不懂得地方反复思考反复听自然会明白的,现在网上的视频都很多的。
(-32)+68+(-29)+(-68)=
(-21)+251+21+(-151)=
12+35+(-23)+0=
(-6)+8+(-4)+12 =
27+(-26)+33+(-27)
12+35+(-23)+0=
39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+[+3/4]+[-1/4]=
[-7/2]+[+5/6]+[-0.5]+4/5+19/6=
[-26.54]+[-6.14]+18.54+6.14=
1.125+[-17/5]+[-1/8]+[-0.6]=
1-4/9 =
1-7/10=
8/15-5=
7-15=
2/8-5/8=
8/27-5 =
4-27 =
11/12-10/12=
16/21-1/7 =
4/ 2-(3+3 )=
1/3- 7/12-7/18=
1 -1/3-1 1/5 =
10-7/10=
5/24+3/8 =
4.5-3/5
1-3/5=2/5
4.39*1/13*2/3
1+(-2)+(-3)+4+5+(-6)+(-7)+8+9+(-10)+(-11)+12
-15.8+13又6分之5+15又5分之4
(-7分之1)+(-7分之2)+1又7分之3
-0.5-(-3 )+2.75-(+7 )
学数学的秘籍就是多思考,不懂得地方反复思考反复听自然会明白的,现在网上的视频都很多的。
第3个回答 2010-07-16
-38)+52+118+(-62)=
(-32)+68+(-29)+(-68)=
(-21)+251+21+(-151)=
12+35+(-23)+0=
(-6)+8+(-4)+12 =
27+(-26)+33+(-27)
12+35+(-23)+0=
39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+[+3/4]+[-1/4]=
[-7/2]+[+5/6]+[-0.5]+4/5+19/6=
[-26.54]+[-6.14]+18.54+6.14=
1.125+[-17/5]+[-1/8]+[-0.6]=
1-4/9 =
1-7/10=
8/15-5=
7-15=
2/8-5/8=
8/27-5 =
4-27 =
11/12-10/12=
16/21-1/7 =
4/ 2-(3+3 )=
1/3- 7/12-7/18=
1 -1/3-1 1/5 =
10-7/10=
5/24+3/8 =
4.5-3/5
1-3/5=2/5
4.39*1/13*2/3
1+(-2)+(-3)+4+5+(-6)+(-7)+8+9+(-10)+(-11)+12
-15.8+13又6分之5+15又5分之4
(-7分之1)+(-7分之2)+1又7分之3
-0.5-(-3 )+2.75-(+7 )
39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+[+3/4]+[-1/4]=
[-7/2]+[+5/6]+[-0.5]+4/5+19/6=
[-26.54]+[-6.14]+18.54+6.14=
1.125+[-17/5]+[-1/8]+[-0.6]=
0.75+[-11/4]+0.125+12又5/7+[-3/8]=
[-4/9]+[-3/5]+[+11/8]+[+5/9]+[-1/8]+[-0.4]=
(-32)+68+(-29)+(-68)=
(-21)+251+21+(-151)=
12+35+(-23)+0=
(-6)+8+(-4)+12 =
27+(-26)+33+(-27)
12+35+(-23)+0=
39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+[+3/4]+[-1/4]=
[-7/2]+[+5/6]+[-0.5]+4/5+19/6=
[-26.54]+[-6.14]+18.54+6.14=
1.125+[-17/5]+[-1/8]+[-0.6]=
1-4/9 =
1-7/10=
8/15-5=
7-15=
2/8-5/8=
8/27-5 =
4-27 =
11/12-10/12=
16/21-1/7 =
4/ 2-(3+3 )=
1/3- 7/12-7/18=
1 -1/3-1 1/5 =
10-7/10=
5/24+3/8 =
4.5-3/5
1-3/5=2/5
4.39*1/13*2/3
1+(-2)+(-3)+4+5+(-6)+(-7)+8+9+(-10)+(-11)+12
-15.8+13又6分之5+15又5分之4
(-7分之1)+(-7分之2)+1又7分之3
-0.5-(-3 )+2.75-(+7 )
39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+[+3/4]+[-1/4]=
[-7/2]+[+5/6]+[-0.5]+4/5+19/6=
[-26.54]+[-6.14]+18.54+6.14=
1.125+[-17/5]+[-1/8]+[-0.6]=
0.75+[-11/4]+0.125+12又5/7+[-3/8]=
[-4/9]+[-3/5]+[+11/8]+[+5/9]+[-1/8]+[-0.4]=
第4个回答 2010-07-18
—5+(—20) -3—(—6) ( -38)+52+118+(-62)=
(-32)+68+(-29)+(-68)=
(-21)+251+21+(-151)=
12+35+(-23)+0=
(-6)+8+(-4)+12 =
27+(-26)+33+(-27)
12+35+(-23)+0=
39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+[+3/4]+[-1/4]=
[-7/2]+[+5/6]+[-0.5]+4/5+19/6=
[-26.54]+[-6.14]+18.54+6.14=
1.125+[-17/5]+[-1/8]+[-0.6]=
1-4/9 =
1-7/10=
8/15-5=
7-15=
2/8-5/8=
8/27-5 =
4-27 =
11/12-10/12=
16/21-1/7 =
4/ 2-(3+3 )=
1/3- 7/12-7/18=
1 -1/3-1 1/5 =
10-7/10=
5/24+3/8 =
4.5-3/5
1-3/5=2/5
4.39*1/13*2/3
1+(-2)+(-3)+4+5+(-6)+(-7)+8+9+(-10)+(-11)+12
-15.8+13又6分之5+15又5分之4
(-7分之1)+(-7分之2)+1又7分之3
-0.5-(-3 )+2.75-(+7 )
39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+[+3/4]+[-1/4]=
[-7/2]+[+5/6]+[-0.5]+4/5+19/6= -7-(+2
)
[-26.54]+[-6.14]+18.54+6.14=
1.125+[-17/5]+[-1/8]+[-0.6]=
0.75+[-11/4]+0.125+12又5/7+[-3/8]=
[-4/9]+[-3/5]+[+11/8]+[+5/9]+[-1/8]+[-0.4]=
(-32)+68+(-29)+(-68)=
(-21)+251+21+(-151)=
12+35+(-23)+0=
(-6)+8+(-4)+12 =
27+(-26)+33+(-27)
12+35+(-23)+0=
39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+[+3/4]+[-1/4]=
[-7/2]+[+5/6]+[-0.5]+4/5+19/6=
[-26.54]+[-6.14]+18.54+6.14=
1.125+[-17/5]+[-1/8]+[-0.6]=
1-4/9 =
1-7/10=
8/15-5=
7-15=
2/8-5/8=
8/27-5 =
4-27 =
11/12-10/12=
16/21-1/7 =
4/ 2-(3+3 )=
1/3- 7/12-7/18=
1 -1/3-1 1/5 =
10-7/10=
5/24+3/8 =
4.5-3/5
1-3/5=2/5
4.39*1/13*2/3
1+(-2)+(-3)+4+5+(-6)+(-7)+8+9+(-10)+(-11)+12
-15.8+13又6分之5+15又5分之4
(-7分之1)+(-7分之2)+1又7分之3
-0.5-(-3 )+2.75-(+7 )
39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+[+3/4]+[-1/4]=
[-7/2]+[+5/6]+[-0.5]+4/5+19/6= -7-(+2
)
[-26.54]+[-6.14]+18.54+6.14=
1.125+[-17/5]+[-1/8]+[-0.6]=
0.75+[-11/4]+0.125+12又5/7+[-3/8]=
[-4/9]+[-3/5]+[+11/8]+[+5/9]+[-1/8]+[-0.4]=
第5个回答 2010-07-13
125