人教版四年级数学下册简便运算专项练习

1、第一种（例）25x（4+8）125x(8+8)(11+25)x8第二种（例）84x101504x2578x10225x204第三种（例）99x6499x16638x99999x99第四种（例）99X13+1325+199X2532X16+14X3278X4+78X3+78X3第五种（例）25X32X125125X32X888X12572X125第六种（例）3600-25W8100 +4H53000+125+81250+25代第七种 1200-624-762100-728-772273-73-27847-527-273第八种 278+463+22+37732+580+268425+14+186第

2、九种 214- (86+14)787- (87-29)365- (65+118 )455- (155+230 )第十种 871-299157-99363-199968-599第 H一种 178X101-17883X102-83X217X23-23X735X127-35X16-11X35第十二种 64 + (8X2)1300+(13 X5)480+(8 X2)第十三种625+25360-24270-45第十五种20X4+ 20X425X4+ 25X456X8+ 56X812X6 12X61347- (347+125 )练习：169+354+231+146987-362-138135+236-13

3、5+236198 X26148 X56-48 X56210-15199 X37+37215 X63-15 X63101 X22-22203 X14125 X33 X4125 X16 X50365+997452-398简便运算习题1.加法交换律（a+b=b+a ）如：152+389+348 习题：77+56+23165+477+135154+288+462.加法结合律a+b+c=a+(b+c)如：591 +482 + 118 习题：285+147+25399+178+122456+588+412692+325+753.加法交换律、结合律如：32 + 29 + 68 + 41 习题：(148+64

4、 ) + (52+136)650+ (171+350 )+129128+114+86+1724.乘法交换律a x b=b x a 25X31 X4125X27X840 X 69 X 255 .乘法结合律：a x b x c= a x (b x c)如：78X125X8125X32习题：52X25X4125 X72125X8825X3225X44125X48习题：125X25X326 .乘法交换律、结合律 如：125X4X8X257 .乘法分配律：a x (b+c)=a x b+a x c如：27X57+27 X4327X 99+2727 X99习题：67X34+67 X66127X43-27

5、X4327X101-2727 X10167 X 21+67 X 78+6767 X 23+67 X 78+67-6712 X 340+66 X 12025X44125 X8885 X 10269X10278X9865+65 X 995X87+87+87 X4745- (245+188 )习题：456-273-127623-169-223553- (289+153)772-456+228689- (289-153 )136-88+164-1128 .减法运算性质；a-b-c=a-(b+c)=a-c-b如：781-178-122721-488-121如：720 苗6 -29 .除法运算性质;a b

6、 c=a 甘x c)=a -c -b习题：2700 + 25 + 45600 +25-563900 + (39X4)五、355+260+140+24598X10148X125645-180-245怎样简便就怎样算、355+260+140+24598X10148X125645-180-24538 X99 + 383500+14 W175 X56 + 25 X5650 X25 X20 X40二、368+156+344+132125X47X87200-25F96X58+96X426300+ (63X5)482 - (182+50)三、368+156+344+132125X47X87200-25W44

7、X25135X27+135X72+13544X2596X58+96X426300+ (63X5)482 - (182+50)四、789-136-64132X29+13298X83+16688 X125048 X125125 X32 X125135X27+135X72+1353700+4 攵536X88+36X15-10838 X99 + 383500+14 代175 X56 + 25 X56125 X32 X25六、98+265+202273-73-27250X13X43200-42588 X12599X38+3817 X23-23 乂772 X125七、64X15-5X6425X (12X4

8、0)99X56+562182 -1655- 3453200 F 攵5298 X99 + 298(40 + 8) >2597X8X125八、355+260+140+245102 X992X125645-180-245382 X 101-3824 X 60 X 50 X 835 X 8+35 X 6-4 X 35125 X32九、25X46101 X5699 X261022 478 422987 (287+ 135)478-256-144672 36+6436 + 64-36 + 64十、487-287-139-61 500-257-34-1432000 -368-1321814-378-4

9、2289 X 99 + 89155+264 + 36 + 4425 X (20 + 4)88X225 + 225 X12、698-291 -9568 (68 + 178)561 19+58382+165 + 35-82236+189+64759-126-25925X79W569-256-44十二、216+89+1157X125X81050 勺5H169X12323X16937 >99+37129X101129149X69149+149X3256X51+56X48+56十三、125X25X3224X25125X48514+189 214369256+15656 X25 X4 X12524X

10、73+26X24109+(291176)十四、16 X98+32512+ (373 212)228+ (72+189 )169+199586X99575250 27537X2121X1221125 X88 X25三、计算（能简便就简便）、85+14X (14+208+ 26)21+(327-23)勺9539-513+(378 勺 4)34-3094+17-1319+(253-22) 2150+20X28-42(23+23) )24-597(110-10) 10-1045-24+14 X14100-10X10-60、304-275+(275 攵5)(70+10)十18-10)120-12 X18

11、-5444+16X15-32(10-100 -10) M1(53-588 1) >36(60+10)千 17-10)17+(233-43) 40、424-475+19X1622+(374-10)攵6(245-11)千8-1122-(10+100 +10)(252-14) 17-1035-13+10 X15(346-10) 16-12215-198 十121 T1)四、19+192-12-10572-22X23-15819+56-1224-34(714-12) 727-1914+(21-19) X418-(13+15) 262736(43-20) 23(227+11) 31-14)36+1

12、9X14-23(45-651 1) >33(20+18) X1-239(7236+18 228) X28五、828+23 X12-4818-15+10X18(31-154 T1)X12(1369-37) -37-32160(22-12) 22357 攵1X13-213985-728 笠6X35(438-39) 21-12六、50+160F0(58+370) + (64-45)120-144 勺 8+35(326+95X25) 为七、178-145+5 X6+42420+580-64X21-28812-700 + (9+31X11 )50 + 160+40120-144 勺 8+35(58

13、+37) + (64-9 >5)95 + (64-45)178-145 -5X6+42八、58X58+58X423874 - (874 + 1000)136 X 101-136329-38-62347-129 -1474600 +25 + 46000 + 125+825X125X32九、44X25591 +482+ 11899 X I26125X15X8986+1999360 - 4556 X 37-56 X 26-5699X 64+64473+79-6380X501-8076+38+24+162199 X99+199十、25X125X4X840 X 9 X 25 X 855 X 25+

14、25 X 4532+129+268+71438+126+162+67455 X 55+45 X 558X6X125X58X135+8 X65、45 X 12+55 X 1242 X 9+58 X 955 X 45+45 X 4518X27+18 X2358 X 137-58 X 3778 X 8-28 X 87X69+7 X 2136 X 27+27 X 64382 X 101-3824 X 60 X 50 X 835 X 8+35 X 6-4 X 35十二、250 X3648 X 250202 X 45125X32199X5025X (8+40)十三、8X6X1257 X4X250250X3X49X59+9 X318X13X12599X 99+9999X199+9935X401-3539 X 101-39301 X 3045 X 201-4549 X 49+4994 + 38+106 + 6