初一100道数学计算题及答案.pdf

-1.25（8+10）=1.258+1.258.3+8.31.76=8.3（1.24+1.76)=8.33=24.999991001=9999（1000+1）=99991000+99991=1000899914.86.58.33.7=（14.8-6.5）6.38.33.7=8.36.3+8.3（6.33.7）=8.310=831.24+0.78+8.76=（1.24+8.76）+0.78=10+0.78=10.78933-157-43=933-（157+43）=933-200=7334821-998=4821-1000+2=3823I3212525=4812525=（425）（8125）=1001000=1000009048268=（2600+2600+2600+1248）26=2600 26+2600 26+2600 26+1248269=100+100+100+48=3482881 43=（1290+1591）434=129043+159143=30+373.242.3 0.42316=3.242.3 42.31.6=42.3(3.2 1.6)=42.3(40.8 40.4)=42.3(40.4240.4)=42.3(4*0.4*7.5-1.25*4*0.4)=42.340.4(7.5-1.25)=42.340.46.25=42.3(42.5)=42371.8+188+3.58-47=52+28-47=80-47(80-9.8)5分之 2-1.32=70.2*2/5-1.32=28.08-1.32=26.7687 分之 41(3.2-2.95)=84/710.25=84/74=8/72700（506499）900=27007900=18900900=2133.02（148.490.85）2.5=33.0257.552.5=33.0223.02=10（111）5.1=（11）5.1=05.1=018.1（30.2990.23）1=18.11.71=18.11.7=19.8-18+29+-52+60=19-3+-2+-1+0+1+2=-3-301+125+301+-75=50-1+-1/2+3/4+-1/4=-1-7/2+5/6+-0.5+4/5+19/6=1.25-26.54+-6.14+18.54+6.14=-81.125+-17/5+-1/8+-0.6=-3-98+76+(-87)*2356+(-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)1/2+3+5/6-7/122/3-4-1/4*(-0.4)/1/3+222+(-4)+(-2)+4*3-2*8-8*1/2+8/1/8(2/3+1/2)/(-1/12)*(-12)(-28)/(-6+4)+(-1)2/(-2)+0/7-(-8)*(-2)(1/4-5/6+1/3+2/3)/1/218-6/(-3)*(-2)(5+3/8*8/30/(-2)-3(-84)/2*(-3)/(-6)1/2*(-4/15)/2/3-3*+2y-5*-7y14372727563 75-（12+18）152160（83-79）18 28084024532513(266250)85(95144024)58870(105202)1437272756381432(135278)37.85-（7.85+6.4）30156(17.7-7.2)3（947599）766436(91327623)192（5438）67（7.1-5.6）0.9-1.152.5 81432(135278)5.42.6（3.7-2.9）+0.62（947599）7664 60(9.528.9)0.18 2.8810.430.243.5 20(2.441.8)0.40.15 28-(3.4 1.252.4)0.815.5-(3.215.79)（31.8 3.24）5 19464.81.80.9 36.724.259.9 3.416（0.01635）0.8(106.76)1.2（136+64）（65-3450.55)4.80.124.8（58+37）（64-95）812-700（9+3111）（3.21.5+2.5）1.685+14（14+20826）120-36418+35（284+16）（512-820818）9.7274/71/3（3/5-3/10）（4/5+1/4）7/3+7/1012.780（13.4156.6）37.812-700（9+3111）（136+64）（65-34523）3.2（1.5+2.5）1.685+14（14+20826）（58+37）（64-90.55)8.5（284+16）（512-820818）0.12 4.80.124.8（3.21.5+2.5）1.6120-364（3.87-0.13）+4.23.74 347+452-41605232.52-（6+9.7283.2）2.5 87（58+37）（64-95）（7.1-5.6）0.9-1.15 2.5（3.21.5+2.5）2.6（3.7-2.9）+0.62 126（12-7.2）-63.26+（1.5+2.5）1.6（3.2 1.5+2.5）（3.87-0.13）+4.2 3.7433.02 （148.4 90.85）2.51)23+(-73)(2)(-84)+(-49)(3)7+(-2.04)(4)4.23+(-7.57)(5)(-7/3)+(-7/6)(6)9/4+(-3/2)(7)3.75+(2.25)+5/4(8)-3.75+(+5/4)+(-1.5)(9)(-17/4)+(-10/3)+(+13/3)+(11/3)(10)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)(11)(+1.3)-(+17/7)(12)(-2)-(+2/3)(13)|(-7.2)-(-6.3)+(1.1)|(14)|(-5/4)-(-3/4)|-|1-5/4-|-3/4|)(15)(-2/199)*(-7/6-3/2+8/3)(16)4a)*(-3b)*(5c)*1/61.3/7 49/9-4/32.8/9 15/36+1/273.12 5/6 2/9 34.8 5/4+1/45.6 3/8 3/8 66.4/7 5/9+3/7 5/97.5/2-（3/2+4/5）8.7/8+（1/8+1/9）9.9 5/6+5/610.3/4 8/9-1/30.121.80.9=7.2(95)0.3=1.02 6.4-=28+4.411.7 5/49+3/1412.6（1/2+2/3）13.8 4/5+8 11/514.31 5/6 5/615.9/7-（2/7 10/21）16.5/9 18 14 2/717.4/5 25/16+2/3 3/418.14 8/7 5/6 12/1519.17/32 3/4.z.-9/2420.3 2/9+1/321.5/7 3/25+3/722.3/14 2/3+1/623.1/5 2/3+5/624.9/22+1/11 1/225.5/3 11/5+4/326.45 2/3+1/3 1527.7/19+12/19 5/628.1/4+3/4 2/329.8/7 21/16+1/230.101 1/5 1/5 2131.5016040（58+370）（64-45）32.120-14418+3533.347+452-41605234（58+37）（64-95）35.95（64-45）36.178-14556+42 420+580-64212837.812-700（9+3111）（136+64）（65-34523）38.85+14（14+20826）39.（284+16）（512-820818）40.120-36418+3541.（58+37）（64-90.55)4.80.124.844.（3.21.5+2.5）1.6（2）3.2（1.5+2.5）5=6-1.194）=0.681.9+0.32（3.87-0.13）+4.23.7450.32.52-（6+9.7283.2）2.551.-5+58+13+90+78-(-56)+5052.-7*2-57/(353.(-7)*2/(1/3)+79/(3+6/4）54.123+456+789+98/(-4)55.369/33-(-54-31/15.5)56.39+3*42/2*(3*8)57.9*8*7/5*(4+6)58.11*22/(4+12/2)59.94+(-60)/101.a3-2b3+ab(2a-b)=a3+2a2b-2b3-ab2=a2(a+2b)-b2(2b+a)=(a+2b)(a2-b2)=(a+2b)(a+b)(a-b)2.(*2+y2)2-4y(*2+y2)+4y2=(*2+y2-2y)23.(*2+2*)2+3(*2+2*)+*2+2*+3=(*2+2*)2+4(*2+2*)+3=(*2+2*+3)(*2+2*+1)=(*2+2*+3)(*+1)24.(a+1)(a+2)+(2a+1)(a-2)-12=a2+3a+2+2a2-3a-2-12=3a2-12=3(a+2)(a-2)5.*2(y+z)2-2*y(*-z)(y+z)+y2(*-z)2=*(y+z)-y(*-z)2=(*z+yz)2=z2(*+y)26.3(a+2)2+28(a+2)-20=3(a+2)-2(a+2)+10=(3a+4)(a+12)7.(a+b)2-(b-c)2+a2-c2=(a+b)2-c2+a2-(b-c)2=(a+b+c)(a+b-c)+(a+b-c)(a-b+c)=(a+b-c)(a+b+c+a-b+c)=2(a+b-c)(a+c)8.*(*+1)(*2+*-1)-2=(*2+*)(*2+*-1)-2=(*2+*)2-(*2+*)-2=(*2+*-2)(*2+*+1)=(*+2)(*-1)(*2+*+1)1.3/7 49/9-4/32.8/9 15/36+1/273.12 5/6 2/9 34.8 5/4+1/45.6 3/8 3/8 66.4/7 5/9+3/7 5/97.5/2-（3/2+4/5）8.7/8+（1/8+1/9）9.9 5/6+5/610.3/4 8/9-1/30.121.80.9=7.2(95)0.3=1.02 6.4-=28+4.411.7 5/49+3/1412.6 （1/2+2/3）13.8 4/5+8 11/514.31 5/6 5/615.9/7-（2/7 10/21）16.5/9 18 14 2/717.4/5 25/16+2/3 3/418.14 8/7 5/6 12/1519.17/32 3/4 9/2420.3 2/9+1/321.5/7 3/25+3/722.3/14 2/3+1/623.1/5 2/3+5/624.9/22+1/11 1/225.5/3 11/5+4/326.45 2/3+1/3 1527.7/19+12/19 5/628.1/4+3/4 2/329.8/7 21/16+1/230.101 1/5 1/5 2131.5016040（58+370）（64-45）32.120-14418+3533.347+452-41605234（58+37）（64-95）35.95（64-45）36.178-14556+42 420+580-64212837.812-700（9+3111）（136+64）（65-34523）38.85+14（14+20826）39.（284+16）（512-820818）40.120-36418+3541.（58+37）（64-90.55)4.80.124.844.（3.21.5+2.5）1.6（2）3.2（1.5+2.5）5=6-1.194）=0.681.9+0.32（3.87-0.13）+4.23.7450.32.52-（6+9.7283.2）2.551.-5+58+13+90+78-(-56)+5052.-7*2-57/(353.(-7)*2/(1/3)+79/(3+6/4）54.123+456+789+98/(-4)55.369/33-(-54-31/15.5)56.39+3*42/2*(3*8)57.9*8*7/5*(4+6)58.11*22/(4+12/2)59.94+(-60)/101.a3-2b3+ab(2a-b)=a3+2a2b-2b3-ab2=a2(a+2b)-b2(2b+a)=(a+2b)(a2-b2)=(a+2b)(a+b)(a-b)2.(*2+y2)2-4y(*2+y2)+4y2=(*2+y2-2y)23.(*2+2*)2+3(*2+2*)+*2+2*+3=(*2+2*)2+4(*2+2*)+3=(*2+2*+3)(*2+2*+1)=(*2+2*+3)(*+1)24.(a+1)(a+2)+(2a+1)(a-2)-12=a2+3a+2+2a2-3a-2-12=3a2-12=3(a+2)(a-2)5.*2(y+z)2-2*y(*-z)(y+z)+y2(*-z)2=*(y+z)-y(*-z)2=(*z+yz)2=z2(*+y)26.3(a+2)2+28(a+2)-20=3(a+2)-2(a+2)+10=(3a+4)(a+12)7.(a+b)2-(b-c)2+a2-c2=(a+b)2-c2+a2-(b-c)2=(a+b+c)(a+b-c)+(a+b-c)(a-b+c)=(a+b-c)(a+b+c+a-b+c)=2(a+b-c)(a+c)8.*(*+1)(*2+*-1)-2=(*2+*)(*2+*-1)-2=(*2+*)2-(*2+*)-2=(*2+*-2)(*2+*+1)=(*+2)(*-1)(*2+*+1).z.