六年级数学简便计算练习题答案
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六年级数学总复习简便计算练习题
一、口算。(10分)
10-2.65=7.35 0÷3.8= 0 9×0.08= 0.72 24÷0.4=60 67.5+0.25=67.75 6+14.4=20.4 0.77+0.33=1.1
5-1.4-1.6=5-3=2 80×0.125=80*81=10 73
÷3×71=73*31×71=49
1
二、用简便方法计算下面各题。(90分,4×20+5×2)
1125-997 998+1246 431+3.2+532+6.8 1252-(172+25
2
) 400÷125÷8 25×(37×8)
=1125-(1000-3) =(998+2)+(1246-2) =(431+532)+(3.2+6.8)=1252-252-17
2
=400÷(125*8)=25*8*37
=1125-1000+3 =1000+1244 =10+10=20 =10-172=875 =400÷1000=5
2
=200*37=7400
=125+3=128 =2244
(41
-61)×12 143×2154×74 34×(2+3413) 125×8.8 4.35+4.25+3.65+3.75 3.4×99+3.4 =(246-244)*12 =47×2154×74 =34×2+34×3413 =125*(8+0.8) =(4.35+3.65)+(4.25+3.75)=3.4*(99+1)
=242*12 =(47×7
4)*2154 =68+13 =125*8+125*0.8 =8+8=16 =3.4*100=340 =1 =1*2154=215
4
=81 =1000+100=1100
17.15-8.47-1.53 17
65-343-465 97÷251+115×92
0.125×0.25×32 22.3-2.45-5.3-4.55 =17.15-(8.47+1.53) =1765-465-343 =97÷511+115×92 =81*41
*32 =22.3-5.3-(2.45+4.55)
=17.15-10 =13-343=941 =97*115+115×9
2
=1 =17-7=10
=7.15 =(97+92)×115=11
5
(1211+187+245)×72 4.25-365-(261-14
3
) 187.7×11-187.7 4387×21+57.125×21-0.5 3415 ×(57 -314 ÷34 )
=1211×72+187×72+245×72 =441+143-(365+26
1
) =187.7*(11-1) =4387×21+5781×21-21 =3415 ×(57 -314 *34)
=11*6+7*4+5*3 =6-6=0 =1887 =21(4387+5781-1) =1549*(57 -72
)
=66+28+15 =21*100=50 =1549*73=5
7
=109
2.42÷4
3+4.58×31
1-4÷3 212 ×6.6+2.5×635 1178 -613 -123 4.6+325 +635 +5.4 2.8+549 +7.2+359 445 -(245
+5
12
) =2.42*34+4.58×34-34*1 =221*653+221*653 =1178 -(613 +123 ) =453+352+653+55
2
=(2.8+7.2)+594+395= 445 -245 -512
=34(2.42+4.58-1) =221*2*653 =1178 -8=387 =453+552+(352+65
3
)=10+9=19 =2- 512 =1127
=34
*6=8 =10+10=20
438 +2.25+558 +734 725 +457 +235 53611 -1647 +16511 237 +359 -337 +149 +147 0.75+58 +14 +0.375 5-21417 -1317 =483+241+585+743 =725 +235 +457 =53611 +16511 -1647 =237 +147 -337 +(359 +149 )=43+85+41+8
3
=5-(21417 +1317 )
=483+585+(241+743)=10+457 =70--1647 =74+5=574 =43+41+(85+83
)=2 =5-4=1
=10+10=20 =1475 =5373
45 +945 +9945 +99945 +999945 48.3-1516 -456 956 ×4.25+414 ÷6 0.625×0.5+58 +12 ×62.5% 3138 ×72513 ÷3138 1645 +(24
7 -1.8) =(1+9+99+999+9999)45 = 48.3-(1516 +456 )=965*441+441*61 =85*21+85*21*85 =3138 ÷3138 ×72513 =1645 +(247 -15
4)
=11107 45 =48103-20=28103 =(965+61)*441 =85*(21+21+1) =1×72513 =72513 =1645 -154+24
7
=10*417=285 =1554+247 =1835
13
2.5×(910 +910 +910 +910 ) 22×34 +25×75%-7×0.75 0.25×6
3.5-14 ×1312 6715 ×2.5-212 ×4715 389 +3.125+119 +17
8
1125-996 =2
21*4*109 =22*43+25*43-7*43 =41*6321-41*1321 =6157*221-221*4157 =389 +11
9 +(381+178
)=1125-(1000-4)
=25*4*109=10*109=9 =(22+25+7)*43=271 =41*(6321-1321) =(6157-4157)*22
1 =5+5=10 =1125-1000+4