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1、*小学数学简便运算专项练习400题第一部分(1-50题)12.065.072.94 30.349.7610.34 33 2574 3441.7 1.250.8 1027.35.1 17+-7 1 11+7+3 933-15.7-4.3 41.0619.7220.28 73+ 8+2-700145 18.62.50.4 1.960.54 1.062.5413 2919.68(2.682.97) 5.68(5.394.32) 19.68(2.979.68) 7+(-) 5-(-) 0.74(71)1.25( 8 0.5) 0.25( 4 1.2) 1.25( 2130.8) 9.3(4) 24(-
2、+) (12+) 7 0.921.410.928.59 -1.311.61.61.3 11.618.49999+999+99+9 4821-9983.212.525 1.2588 7.60.25 3.50.1251.8991.8 3.89.90.38 103-2- 1.019.61020.87 2.69.9 31+ + 第二部分(51-100题)36 3813.527+13.572+13.5 1.57.4+0.6150%+2 5.3+2.725% 0.6710.16.7 2821.62.816 5.61.70.5683 6.62.5 4.6+5.4 ()2.8+7.2+ +2.25+ + +
3、0.75+0.375 + (+) 5- 48.3- 4.25+6 3.60.25 0.6250.5+62.5% 2.5(+) 22+2575%-70.75 0.2563.5 2.5-+3.125+ +(-1.8) (111+999) 56(-) 49.5-(50-)0.6 + 45(+0.6)89737.5%+1040.375 (5.375) 3.5+1.25+3.8 7199 3755+2996 8439+1001 446+295 888+999 299101 563999 210020 1125-996 60.25 72156-5672 第三部分(101-150题)2532125 7099
4、9+709 0.2548 2.5-0.4226.6+2.56 75.399+75.34.63.7+540.37 0.125+8.25+12.5%1161 154.25519.826.573.43 4.6+3+6+5.44+2.25+5+7 9.632.548.37-3.25-(1.37+1.75) 3 + 18(+)7+5 ()(24)(+) (+) 7+5 ()24)() (3217) (25) (2121) (99)9 3() ()30 4 5841 () 235 - 13518 1530.653 第四部分(151-200题)() 10 - - + 25 13.098.124.88 121
5、03450075 () ()1511 37.519.52.541125997 998+1246 4+3.25+6.8 25(378) 12(1+2) 4001258 ()12 12 34(2) 1258.8 4.354.253.653.75 3.4993.417.158.471.53 1734 0.1250.2532 22.32.455.34.55 (+)72 4.253(21) 187.711187.7 2 4357.1250.5 () 2.42+4.5843 6.6-2.5 + (-)4.6-+5.4 2.8+7.2+ -2.25+- +14 + 5-+ 0.75+0.375 -+-+ 4
6、8.3- 4.25+6 +(-1.8)0.6250.5+62.5% 8 2.5(+- - ) 22+2575%+50.75 第五部分(201-250题) 3.20.254 0.4(3.850.4)13.8 15.8+14.2 8( +)+ ; ( +) 680.5(7.50.7) 251.254 (3.75+4.1+2.35)0.8 1 9916+16 10+18 26.356.2+14.5 31.918831.9 21(+) (+)45 (170) 12(+) (0.125)0.5 15.37+34.63 24(+) 36056() (1.7+1.7) 80.78.7+8.0713 () 9
7、6 10.64+4.53.6+11.36 7(+) + 2+ (+) (+) 7.32(3.8+1.32) 0.624+76 () 7+(31)+ 1880201.1187.92011 3.21.250.25 5.81(2.12.09)101 42(+) +75% ()(+) 第六部分(251-300题)8.850.250.75 (51+)17 375+4501825 1.250.2532 14.225%+ (1) +2+3.25+3 (+)1517 687.5+322.5 () 175+25112 8.0299+8.92+ (+)75 (0.75) +(2.5) 0.45+0.450.91.
8、8 952.25 25104 0.6254.3+4.7+62.5% (+)106 203 2005 999+99+9+ (+) 1.33.79+9.76.21 (+)18.5 8+4 2.84.1+0.2859 26.71.751.5 8+8 691200198 + (11)+ 67 1.91.9(1.91.9) 0.7+3.9+4.3+6.1 12.250.640.36+7.75 3 () (+)7+ ()() + 60.375+0.3753+0.375 4.67(2.98+0.67) 34 7699 36(+) (+) 第七部分:(第301-350题)4.051.81.2 1253225
9、(+) 1.25322.5 + 7.38(1.57+2.38) +99 1() 931523+77 1.25322.5 7.253+3.756 0.62512.23.2+ (+) 1840.25+15+25% 187(1512) 18+6.25+7+3.75 8+ 6.4383.86.436.4383.86.43 1258.08 8615380 7925+2079+7955 ()4 () 7+3+2+6 7+ 2.50.125804 167+289+33+11 4812528 2352+5277 ;89101 32+51 14.851.588+31.21.2 2.25+2.751+60% 10
10、00+999998997+996+995994993+104+103102101, 1.250.2532 0.253.784 6.7410.1 0.8599 6.83.7+6.86.3 13.62.8+7.47.2 982.5 23+ 3.580.125 13+ 54.2+4.8; 3.5+5.580%+0.8 第八部分(351-430题)123434341212 201820181998199819982018 + 答案:第一部分(1-50题)12.065.072.94=20.07 30.349.7610.34 =29.7633 =9 2574 =7003441.7 = 5 1.250.8
11、=1027.35.1 = 146 17+-7 =10 1 = 11+7+3 =22933-15.7-4.3 =913 41.0619.7220.28=1.06 73+=4 8+2-=10700145=10 18.62.50.4=18.6 1.960.54 =0.98 1.062.54=10.613 =13 29=2919.68(2.682.97)=14.03 5.68(5.394.32)=15.39 19.68(2.979.68)=7.03 7+(-)=7 5-(-) =5 0.74(71)=1.25( 8 0.5)=20 0.25( 4 1.2)=1.2 1.25( 2130.8)=213
12、9.3(4)=40 24(-+)=17 (12+) 7=86 0.921.410.928.59=9.2 -=1.311.61.61.3=13 11.618.4=549999+999+99+9=11106 4821-998=38233.212.525=1000 1.2588=110 7.60.25=30.4 3.50.125=281.8991.8 =180 3.89.90.38 =38 103-2-=28 1.019.6=906961020.87=88.74 2.69.9=25.74 31+=7 +第二部分(51-100题)36= (37-1)=32 38=(37+1)=3313.527+13.
13、572+13.5=1350 1.57.4+0.6150%+2= 5.3+2.725% =2.5 0.6710.16.7=0.067 2821.62.816=560 5.61.70.5683=56 6.62.5=33 =3 4.6+5.4 =20 ()=2.8+7.2+=19 +2.25+=20 +=1 +=53+=5 0.75+0.375=2 +=1-+10-+100- +1000- +10000- = 11110 (+)=1 5-=1 48.3-=28.3 4.25+6 =42.5 3.60.25 =0.90.6250.5+62.5% =1.25 = 2.5(+)=9 22+2575%-70
14、.75=30 0.2563.5=12.5 2.5-=5+3.125+=10 +(-1.8)=17 (111+999) 56(-)=370 49.5-(50-)0.6 =495 +=7 45(+0.6)=2089737.5%+1040.375=875 (5.375) =0 3.5+1.25+3.8=12.5 7199=7029 3755+2996=6751 8439+1001=9440446+295=741 888+999=1887 299101=30199 563999=562437 210020 =105 1125-996=12960.25=64=24 72156-5672=7200 第三部
15、分(101-150题)2532125=2548125=100000 70999+709=70900 0.2548=0.25412=12 2.5-0.42=0.926.6+2.56 =33 75.399+75.3=75304.63.7+540.37 =37 0.125+8.25+12.5%=1.251161 =3 154.255= 519.826.573.43 =9.82 4.6+3+6+5.4=204+2.25+5+7=20 9.632.54=9.63(2.54)=0.9638.37-3.25-(1.37+1.75)=2 =3=2 +=+= 18(+)=237+5 =8 ()(24)=1(+)
16、= (+)=1() = = (3217)=60 (25)=103 = = =20 =0(2121) = (99)9 =11 = 3=6() = ()30 =49 = 4 =2 5841=12.5 ()=4 = = 235 - 13518 =227.5 153 0.653=60 第四部分(151-200题)()= 10 - - + =925=1 13.098.124.88=0.09 12103450075 =96 () ()1511=1511+ 1511 =67 37.519.52.54=68.71125997 =128 998+1246 =2224 4+3.25+6.8=20 25(378)=
17、7400 12(1+2)=8 4001258=0.4 ()12 =1 12= 34(2)=81 1258.8 =12.5(8+0.8)=1100 4.354.253.653.75=16 3.4993.4=34017.158.471.53 =7.15 1734=9 0.1250.2532=1 22.32.455.34.55=10(+)72=109 4.253(21)=0 187.711187.7=1877 2 = 4357.1250.5=50 ()= 2.42+4.5843=8 6.6-2.5=0 +=19 (-)=24.6-+5.4=0 2.8+7.2+=19 -2.25+-=0 +14 =1
18、4 +=53 5-=1+=5 0.75+0.375=2 -+-+= 9090 48.3-=28.3 4.25+6= 42.5 +(-1.8)=170.6250.5+62.5% =1.25 8= (31+)8=251 2.5(+-)=0 22+2575%+50.75=39 第五部分(201-250题)3.20.254= 0.4(3.850.4)13.8=0.1; 15.8+14.2=29 8( +)+=4;( +)=; 680.5(7.50.7)=20 251.254 =125 (3.75+4.1+2.35)0.8=8.08 1 =0 9916+16=1600 10+18=30 26.356.2
19、+14.5=18.75 31.918831.9=319; 21(+)=35;(+)45=36; (170)=; 12(+)=1; (0.125)0.5=0.515.37+34.63=50; 24(+)=11;36056()=120; (1.7+1.7)=;80.78.7+8.0713=807; ()=96=; =;=; =;=8; =610.64+4.53.6+11.36=38.2; 7(+)=;+=; 2+=;(+)=; (+)=7.32(3.8+1.32)=2.2; 0.624+76=60;()=; 7+(31)+=71880201.1187.92011=201.1 =25;=; =6483.21.250.25=1; 5.81(2.12.09)=580;101=62; 42(+)=36;+75%=0.75; ()(+)=第六部分(251-300题)8.850.250.75=7.85; (51+)17=3;375+4501825=1000; 1.250.2532=10;14.225%+=3.75; (1)=1+2+3.25+3=10; (+)1517=47;687.5+322.5=90; ()=175+25112=88; 8.0299+8.92=802.9;+=1; (+
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