四年级数学简便计算题

1、简便计算158+262+13825 X32 X1255001 -247-1021 -23249700+700(181+2564 )+2719102X76378+44+114+242+222276+228+353+219(375+1034)+(966+125)497-29999+999+9999+9999988 X1257755-(2187+755)58 X982214+638+2863065 -738-1065(12+24+80) 502357-183 -317-3574800+252365 -1086-214(2130+783+270)+10172370+199584X36+64X84399

2、9+498138 X25 W899+34475X24(13M25)X38)178X101178704X25375+219+381+22532N25+125)1883-39883X102-83X298X199123X18-123X3+85X123810047550X(344)325X(24+16)178X99+17875X99+2X7579X42+79+79X577300-25F31X870+13X31016800+1203010021002356(1356-721)32000+40075X27+19X251235-(1780-1665)1248-2425x(4+8)32X16+14X32315

3、0+154X2565+25X28)21500+125(300+6)x12504x25125x(35+8)(13+24)x878X4+78X3+78X384x10125+199X2578x10225X32X12525x20499x648100+475273-73-271034+780320+102999x9999X13+1399x16365-(65+118)3600+25F847-527-273125X32X8278+463+22+373000-1258787-(87-29)88X125638x992100-728-772425+14+186455-(155+230)1250+25W1200-6

4、24-76732+580+26817X23-23X772X125214-(86+14)576-285+85363-199600-601583X102-83X2755-287+8712X6+12X620X4笠0X4825-657+5735X127-35X16-11X35178X101-178736-35X2036X936X9100+45-100+45968-599157-9936-366-6-25X23X40+4)48X99+125X4+25X498-18X5+2556X856X8 +871-299280-80 -415X97+348 X 52 X 2 4 X 48 184 +98125 X 3

5、2 X 25 1248 + 24158+262+138175-75笠525X825X8+690-177+7780-20X2+60100+1-100+125X8+(25X8)25+75-25+7540+36020-10100-36+6465+35X131000+8-1000+813+24X8356X9-56X98641995+95X28672-36+64999X999+1999704X25(569+468)+(432+131)26X39+61X26324-68+32738-30199X55-559X72X12578X101孑852X76+47X7&6695+202102X35630+423150

6、 + 15(181+2564 ) +2719134X56434+45X134373129+2999+999+9999+9999998X42(375+1034)+(966+125)4800+25256-147-53380+476+120(13义125)X(3X8)189(89+74)28 X 4 X 25373 -129 +29378+44+114+242+222(12+24+80) X 50720 + 16 +5138 X 25 X 4(2130+783+270)+1017456 (256 36)375+219+381+2252357 -183-317 -35725 X 32 X 125237

7、0+19955001 247 1021 23221500 + 125(181+2564 ) +2719497 299276+228+353+2198100 + 4+ 7579 X 42+79+79 义 57 25 义(24+16 )2214+638+28684 X 36+64 X 84 1883 3985001 -247 -1021 -2323065 -738 -1065899+344276+228+353+219178 X 99+1787300 + 25 + 4(375+1034)+(966+125)32 X (25+125)158+262+138375+219+381+225178 X 1

8、01 178102 X 7650 X (34 X 4) X 32365 1086 21475 X 99+2 X 75378+44+114+242+22288 X 1253999+49812X25123X18123X3+85X123)9+999+9999+9999998X1992365-1086-2143999+498(13X125)X(3X&100+4+75(2130+783+270)+101775247755 -(2187+755)7300 + 25 +42214+638+2863065-738-106575X24178X10117821500+1252357-183-317-357(12+

9、24+80)X5084X36+64X842370+1995123X18-123X3+85X1231883-39812X2532X(25+125)497-29983X10283X2899+344138X25X44.37+0.28+1.63+5.7279X42+79+79X5716800+1202.73+0.89+1.2725X32X125178 X 99+1789.3 5.26 2.7414.9 - (5.2 + 4.9)704 X 25运算定律和性质1、加法交换律：两个加数交换位置，和不变。这叫做加法交换律。用字母表示：a+b=b+a2、加法结合律：三个数相加，先把前两个数相加，或者先把后两个

10、数相力口，和不变。这叫做加法结合律。用字母表示：(a+b)+c=a+(b+c)3、乘法交换律：两个因数交换位置，积不变。这叫做乘法交换律。用字母表示：axb=bxa4、乘法结合律：三个数相乘，先把前两个数相乘，或者先把后两个数相乘，积不变。这叫做乘法结合律。用字母表示：(axb)xc=ax(bxc)5、乘法分配律：两个数的和与一个数相乘，可以先把它们与这个数分别相乘，再相加。这叫做乘法分配律。用字母表示：(a+b)xc=axc+bxcax(b+c)=axb+axc拓展：(a-b)xc=axc-bxcax(b-c)=axb-axc6、减法的性质：一个数连续减去两个数，可以减去这两个减数的和。用字母表示：a-b-c=a-(b+c)a-(b+c)=a-b-c7、一个