应用加法交换律和结合律简便计算练习 下载本文

37+(21+63)= 331+(411+69)= 501+(198+99)= 54+477+46+23= 358+142+46+254= 14+486+76+324= 31+(145+69)= 245+55+487+13= 292+(103+208)= 281+159+219+41= 298+72+202+28= 425+190+110+175= 303+48+152+297= 51+82+218+249= 261+50+50+= 695+42+5+58= 29+342+71+158= 69+136+464+31= 122+(325+478)= 176+(479+124)= 184+(310+116)= 347+(258+53)= 274+62+38+326= 359+241+160+40= 49+51+172+528=

196+(601+104)= 495+(299+205)= 89+(580+11)= 365+(303+35)= 130+99+101+570= 479+144+121+56= 297+75+203+125= 237+(358+163)= 145+155+283+117= 5+188+212+95= 329+129+371+71= 28+30+170+572= 65+255+35+445= 292+(20+208)= 388+237+112+163= 37+63+133+67= 73+(115+627)= 163+123+37+77= 37+263+478+22= 427+173+16+184= 62+(7+)=

72+28+268+432= 116+56+44+584= 154+(146+46)= 236+123+164+177=

67+32+668+33= 6+678+94+22= 67+33+550+150= 97+(172+403)= 58+642+7+193= 270+(623+30)= 57+(461+243)= 114+42++58= 510+(275+190)= 162+162+38+538= 200+(118+400)= 315+36+285+64= 51+411+49+189= 169+252+431+48= 71+299+401+29= 172+363+128+137=249+237+351+63= 250+50+163+437= 526+(273+174)= 194+5+95+406= 107+(348+93)= 67+51+133+149= 98+(876+2)= 47+433+167+153= 37+306+63+294=

517+39+183+161= 282+18+100+200= 217+(217+83)= 17+683+133+67= 115+8+92+85= 170+(86+230)= 461+168+32+39= 206+94+109+91= 266+(266+34)= 95+(543+305)= 117+(237+483)= 433+(149+267)= 3+(397+97)= 35+92+8+165= 210+(422+290)= 181+62+38+419= 178+(758+22)= 452+(176+148)= 8+57+92+243= 5+183+495+217= 133+39+67+461= 287+192+308+13= 12+258+242+188= 131+(177+569)= 106+94+154+246=

610+90+100+100= 62+38++61= 7+(521+93)= 68+267+332+133= 84+129+16+571= 168+213+32+287= 176+(37+124)= 122+278+25+375= 51+81+249+319= 71+129+37+263= 65+35+184+16= +(244+114)= 94+6+457+143= 38+177+162+423= 130+(302+470)= 31+4+296+369= 324+(426+176)= 237+144+263+56= 188+165+212+35= 356+(394+44)= 40+150+350+360= 298+362+38+202= 167+33+167+333= 179+268+32+121= 62+38+184+516=

382+291+118+9= 208+192+103+197= 159+63+341+37= 249+72+451+28= 189+(634+11)= 151+149+34+66= 475+225+70+130= 176+324+265+35= 55+45+628+72= 4+492+8+96= 196+189+4+111= 358+330+42+70= 374+226+187+13= 260+(170+340)= 32+(612+268)= 41+159+157+143= 62+338+64+36= 25+475+85+315= 11+2+98+689= 490+77+23+210= 98+(341+502)= 364+69+336+131= 189+50+50+111= 76+(176+424)= 172+66+528+34=

210+8+92+190= 416+270+184+30= 518+93+82+7= 122+345+78+155= 26+(206+474)= 303+297+88+12= +164+536+61= 449+151+25+75= 82+75+418+125= 301+99+259+41= 147+92+8+53= 137+63+157+343= 480+252+120+48= 61+239+301+199= 688+12+64+136= 296+(152+304)= 133+24+367+76= 94+6+256+344= 284+133+167+316= 93+45+7+255= 359+23+77+341= 188+(473+112)= 611+54+89+146= 92+30+608+170= 223+129+77+271=

444+(307+56)= 79+27+621+73= 378+225+122+75= 197+6+403+294= 241+123+77+59= 174+12+488+126= 218+(203+482)= 43+357+118+282= 190+410+193+107= 137+(250+563)= 92+(336+308)= 505+(217+95)= 183+141+17+59= 89+(314+111)= 211+126+389+74= 294+45+6+55= 72+(203+128)= 12+88+184+216= 235+45+455+165= 12+199+101+588= 40+93+260+7= 240+53+347+160= 268++32+20= 438+19+281+162= 594+(83+106)=