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-= 0÷= 0 9×= 24÷=60 += 6+= +=--=5-3=2 80×=80*81=10 73
÷3×71=73*31×
7
1=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++532+ 1252-(172+25
2
) 400÷125÷8 25×(37×8)
=1125-(1000-3) =(998+2)+(1246-2) =(431+532)+(+)=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× +++ ×99+ =(246-244)*12 =47×2154×74 =34×2+34×3413 =125*(8+) =(+)+(+)=*(99+1)
=242*12 =(47×7
4)*2154 =68+13 =125*8+125* =8+8=16 =*100=340 =1 =1*2154=215
4
=81 =1000+100=1100
-- 17
65-343-465 97÷251+115×92
××32 --- =(+) =1765-465-343 =97÷511+115×92 =81*4
1
*32 =(+)
= =13-343=941 =97*115+115×9
2
=1 =17-7=10
= =(97+92)×115=11
5
(1211+187+245)×72 -365-(261-14
3
) ×11- 4387×21+×21- 3415 ×(57 -314 ÷34 )
=1211×72+187×72+245×72 =441+143-(365+26
1
) =*(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
÷
4
3+×31
1-4÷3 212 ×+×635 1178 -613 -123 +325 +635 + +549 ++359 445 -(245 +512 )
=*34+×34-34*1 =221*653+221*653 =1178 -(613 +123 ) =453+352+653+55
2
=(+)+594+395= 445 -245 -512
=34(+) =221*2*653 =1178 -8=387 =453+552+(352+65
3
)=10+9=19 =2- 512 =1127
=3
4
*6=8 =10+10=20
438 ++558 +734 725 +457 +235 53611 -1647 +16511 237 +359 -337 +149 +147 +58 +14 + 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 1516 -456 956 ×+414 ÷6 ×+58 +12 ×% 3138 ×72513 ÷3138 1645 +(247
=(1+9+99+999+9999)45 = (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
×(910 +910 +910 +910 ) 22×34 +25×75%-7× ×-14 ×1312 6715 ×212 ×4715 389 ++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