青島版小學(xué)四年級(jí)下冊(cè)數(shù)學(xué)簡(jiǎn)便算法練習(xí)題

1、704X2525X32X12532X(25+125)青島版小學(xué)四年級(jí)下冊(cè)數(shù)學(xué)簡(jiǎn)便算法練習(xí)題158+262+138姓名得分375+219+381+22550012471021232(181+2564)+2719(375+1034)+(966+125)99+999+9999+999997755(2187+755)899+3442144972991883-398378+44+114+242+222(2130+783+270)+10172214+638+28623571833173572370+199512X25276+228+353+219306573810652365-1086-3999+4987

2、5X24138X25X4(13X25)X38)(12+24+80)50簡(jiǎn)便計(jì)算練習(xí)題2姓名得分88X125102X7658X98178X10117884X36+64X8475X99+2X7550X(344)325X(24+16)178X99+17816800-12030100-210032000-40021500-125簡(jiǎn)便計(jì)算練習(xí)題3得分4X(2565+25X28)83X10283X298X199123X18-123X3+85X12379X2+79+79X577300+25W8100-47549700-7001248-243150-154800以52356-(1356721)1235-(17

3、801665)75X27+19X25第一種(300+6)x1225x(4+8)125x(35+8)(13+24)x8第二種84x101504x2578x10225x204姓名31X870+13X310736-35X2025X4+25X4871-299157-99363-199968-599178X101-178第十二種83X102-83X235X127-35X16-11X3517X23-23X7簡(jiǎn)便計(jì)算練習(xí)題姓名得分容易出錯(cuò)類型（共五種類型）600-601520X420X4第四種第五種簡(jiǎn)便計(jì)算練習(xí)題48100-4753000-12581250255第十種第十一種第三種99x6499x16638

4、x99999x9999X13+1325+199X2532X16+14X3278X4+78X3+78X3125X32X825X32X12588X12572X125姓名得分第六種第七種1200-624-762100-728-772273-73-27847-527-273第八種278+463+22+37732+580+2681034+780320+102425+14+186第九種214-(86+14)787-(87-29)365-(65+118)455-(155+230)576-285+85825-657+57690-177+77755-287+8798-18X5+2556X856X8-280-80

5、-412X612X6175-75專525X825X8士80-20X2+6036X936X936-36書-625X8(25X8)-100+45-100+4515X97+3100+1-100+148X99+11000+8-1000+85+95X28102+1-102+165+35X1325+75-25+7540+360-20-1013+24X8672-36+64324-68+32100-36+64簡(jiǎn)便計(jì)算練習(xí)題6姓名得分13426X39+61X26356X9-56X999X55+5578X101-7852X76+47X76+76134X56-134+45X48X52X2-4X4825X23X(40

6、+4)999X999+1999184+98695+202864199738301380+476+120(569+468)+(432+131)704X25256-147-53373129+29189一(89+74)28X4X25125X32X259X72X125簡(jiǎn)便計(jì)算練習(xí)題7姓名得分720+16+5630+42456一(25636)102X3598X42158+262+138375+219+381+225(181+2564)+2719378+44+114+242+222500-247-10223299+999+9999+999997755(2187+755)2214+638+286簡(jiǎn)便計(jì)算練習(xí)

7、題8姓名得分3999+498188339812X2575X24(13X125)X(3X8)(12+24+80)276+228+353+219(2130+783+270)+1017(375+1034)+(966+125)30657381065899+3442357183317357236510862144972992370+1995138X25X4X507625X32X12532X(25+125)88178X101-17898X19912325X(24+16)7300+25+41248+243150 x125102X84X36+64X8475x18-123X3+85X123178X99+1787

8、98100+4+75簡(jiǎn)便計(jì)算練習(xí)題9姓名+154800+25X99+2X7550X(34X4)XX42+79+79X57158+262+138得分21500+125375+219+381+2255001247-1021-232378+44+114+242+222(375+1034)+(966+125)(2187+755)2214+638+28630657381065899+344235718331735723651086214497299(2130+783+270)+101799+999+9999+999997755一(181+2564)+2719276+228+353+2192370+199

9、53999+4981883398簡(jiǎn)便計(jì)算練習(xí)題10姓名12X2575X24138X25X4(13得分X125)X(3X8)(12+24+80)X50704X2525X32X12532X(25+125)88X125102X7658X98178X101-17884X36+64X8475X99+2X7583X10283X298X199123X18123X3+85X12350X(34X4)X325X(24+16)簡(jiǎn)便計(jì)算練習(xí)題11姓名得分0.58X10.150.2X990.18+4.260.18+4.26運(yùn)算定律和性質(zhì)1、加法交換律：兩個(gè)加數(shù)交換位置，和不變。這叫做加法交換律。用字母表示:a+b=b+

10、a2、加法結(jié)合律：三個(gè)數(shù)相加，先把前兩個(gè)數(shù)相加，或者先把后兩個(gè)數(shù)相加，和不變。這叫做加法結(jié)合律。用字母表示：(a+b)+c=a+(b+c)178X99+17879X42+79+79X5721500+1257300+25+4810016800+1202.73+0.89+1.274.37+0.28+1.63+5.72100.4322.5689.3一5.262.7414.9(5.2+4.9)18.325.474.3225X6.8X0.040.25X32X0.1256.4X1.25X12.50.45X1014.7X9.93.28X5.7+6.72X5.72.1X99+2.12.3X0.1+2.3X9.93、乘法交換律：兩個(gè)因數(shù)交換位置，積不變。這叫做乘法交換律。用字母表示：axb=bxa4、乘法結(jié)合律：三個(gè)數(shù)相乘，先把前兩個(gè)數(shù)相乘，或者先把后兩個(gè)數(shù)相乘，積不變。這叫做乘法結(jié)合律。用字母表示：(axb)xc=ax(bxc)5、乘法分配律：兩個(gè)數(shù)的和與一個(gè)數(shù)相乘，可以先把它們與這個(gè)數(shù)分別相乘，再相加。這叫做乘法分配律。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、減法的性質(zhì)：一個(gè)數(shù)連續(xù)減去兩個(gè)數(shù)，可以減去這兩個(gè)減數(shù)的和。用a-b-c=a-(b+c)a-(b