初一有理数混合运算题30道
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[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)5+21*8/2-6-5968/21-8-11*8+61-2/9-7/9-564.6-(-3/4+1.6-4-3/4)
1.(-100)x(-20)x(-5)=2000x(-5)=-100002.(0.7)x(负的1又五分之三)=-28/253.(-2)x(-1/2)x(-3)=-34.(-1/2)x6=-35.(-1
1.345x0.345x2.96-1.345(的3次方)-1.345x0.345(的2次方)=-1.345(1.345^2-2*1.345*0.345+0.345^2)=-1.345(1.345-0.
(1)19(2)①-1+2-3+4+5-6+7-8+9-10-11+12②-1-2+3+3-5+6+7+8-9-10+11-12(3)1.原式=(b-a)+(-a-c)-(b-c)+(-2c)=b-a
-(-3又1/2)-(+5/6)-(-2又3/4)=(3又1/2+2又3/4)-5/6=6又1/4-5/6=5又5/12
http://www.lmedu.com.cn/Article/FREE_SX/FREE_DEMO/2004916100520.asphttp://www.zhongkao.cn/UpF_Articl
-5+21*8/2-6-5968/21-8-11*8+61-2/9-7/9-564.6-(-3/4+1.6-4-3/4)1/2+3+5/6-7/12[2/3-4-1/4*(-0.4)]/1/3+222
本来就是-8,加括号只是不和加减法混淆.等于4
102×(-4.5)-(-3)×(-5)÷27.8×6.9+2.2×6.9(-2)+2-(-52)×(-1)×5+87÷(-3)×(-1)5.6×0.258×(20-1.25)(-7.1)×〔(-3)
-5+21*8/2-6-5968/21-8-11*8+61-2/9-7/9-564.6-(-3/4+1.6-4-3/4)1/2+3+5/6-7/12[2/3-4-1/4*(-0.4)]/1/3+222
有理数混合运算1)(-9)-(-13)+(-20)+(-2)(2)3+13-(-7)/6(3)(-2)-8-14-13(4)(-7)*(-1)/7+8(5)(-11)*4-(-18)/18(6)4+(
(1)(-9)-(-13)+(-20)+(-2)(2)3+13-(-7)/6(3)(-2)-8-14-13(4)(-7)*(-1)/7+8(5)(-11)*4-(-18)/18(6)4+(-11)-1
原式=13+5+5=23
75÷〔138÷(100-54)〕85×(95-1440÷24)80400-(4300+870÷15)240×78÷(154-115)1437×27+27×563〔75-(12+18)〕÷152160
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)5+21*8/2-6-5968/21-8-11*8+61-2/9-7/9-564.6-(-3/4+1.6-4-3/4)
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)5+21*8/2-6-5968/21-8-11*8+61-2/9-7/9-564.6-(-3/4+1.6-4-3/4)
一.-8-(-1)=-8+1=-7二.2.45+(-30)=-(30-2.45)=-27.55三.-1.5-(-11.5)=-1.5+11.5=10四.-1/4-(-1/2)=-1/4+1/2=-1/
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)5+21*8/2-6-5968/21-8-11*8+61-2/9-7/9-564.6-(-3/4+1.6-4-3/4)
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)5+21*8/2-6-5968/21-8-11*8+61-2/9-7/9-564.6-(-3/4+1.6-4-3/4)