应用加法交换律和结合律简便计算练习

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+45

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