应用加法交换律和结合律简便计算练习 下载本文

125+(708+75)= 50+275+425+150= 165+(33+535)= 133++167+62= 204+39+396+61= 392+135+108+65= 292+63+137+208= 70+(155+130)= 28+(478+172)= 200+200+421+79= 64+32+68+36= 26+74+220+80= 264+336+34+66= 131+295+5+269= 124+(481+176)= 88+212+67+33= 376+(389+24)= 154+390+346+10= 83+429+17+371= 15+687+85+113= 61+239+112+88= 347+74+26+153= 233+9+191+367= 462+(172+238)= 104+207+96+493=

217+145+155+283= 382+218+241+59= 418+80+20+82= 103+14+86+297= 125+(407+75)= 48+(395+52)= 412+(259+88)= 99+225+1+475= 392+63+108+37= 454+(136+246)= 283+387+113+117= 377+223+76+24= 123+577+16+84= 412+117+83+188= 488+(330+12)= 226+(226+174)= 296+39+104+161= 244+72+128+256= 10+78+90+322= 93+7+46+554= 288+105+412+95= 135+165+65+535= 97+(445+103)= 20+280++161= 113+187+175+225=

151+27+349+73= 433+(275+267)= 168+232+289+11= 50+50+655+45= 182+(793+18)= 254+(292+146)= 25+93+107+275= 498+102+187+113= 435+(178+65)= 27+(525+173)= 581+156+119+44= 35+297+565+3= 307+(2+93)= 307+(203+193)= 221+79+310+290= 210+(93+490)= 302+(13+298)= 132+68+166+534= 285+(604+15)= 437+23+77+63= 163+29+71+337= 73+105+95+127= 679+(45+21)= 50+46+254+550= 5+36+295+264=

315+(365+85)= 141+24+359+276= 308+168+392+32= 99+289+11+301= 18+(68+382)= 129+71+109+291= 57+123+643+77= 218+103+197+82= 20+680+88+12= 108+99+592+101= 86+315+14+185= 23+477+58+42= 389+(527+11)= 176+424+148+52= 256+(37+244)= 158+(306+342)= 211+2+98+489= 93+298+2+407= 174+(273+426)= 357+78+122+143= 71+29+310+290= 127+(85+373)= 278+322+88+212= 41+55+245+259= 152+48+436+164=

225+(372+275)= 303+(59+197)= 215+(153+485)= 344+69+131+56= 435+(225+65)= 291+17+83+409= 499+165+35+1= 214+228++72= 610+11+89+90= 39+269+131+61= 185+(465+215)= 40+283+17+160= 32+159+68+141= 129+271+29+371= 275+20+80+325= 215+(352+285)= 58+(23+442)= 269+31+148+52= 143+(172+557)= 283+33+117+367= 26+(122+474)= 387+(93+213)= 243+120+457+80= 114+(463+286)= 421+62+38+279=

506+68+32+194= 25+475+337+63= 99+375+125+301= 153+185+215+147= 19+29+371+181= 85+15+178+22= 405+165+35+95= 198+(51+502)= 161+539+43+157= 568+38+62+132= 224+9+191+76= 16+389+11+84= 30+70+562+38= 299+42+201+358= 67+(714+33)= 152+48+244+156= 53+462+247+= 2+(840+98)= 25+8+92+475= 73+327+445+55= 157+(78+543)= 21+179+40+560= 124+(299+376)= 401+(207+299)= 158+42+52+148=

271+29+16+484= 204+250+50+96= 3+(795+97)= 450+(+250)= 28+72+238+262= 396+60+4+140= 79+21+124+176= 27+273+445+55= 52+(236+348)= 78+285+122+315= 163+141+59+37= 607+(67+93)= 50+275+425+150= 496+(212+104)= 162+++114= 26+153+74+547= 19+(695+81)= 54+(873+46)= 55+45+31+169= 133+67+106+94= 367+(107+133)= 89+549+251+11= 194+(659+6)= 91+9+283+517= 11+31+269+189=

350+45+350+55= 204+15+96+185= 109+(523+191)= 371+207+229+93= 301+199+64+236= 268+(96+332)= 198+2+22+278= 75+(423+25)= 172+28+286+314= 253+247+91+109= 277+(369+223)= 133+362+338+67= 111+459+289+41= 102+144+56+398= 76+568+32+124= 19+(194+181)= 598+102+43+57= 410+(382+90)= 578+(62+122)= 542+158+172+28= 293+(314+307)= 148+18+182+152= 43+(55+457)= 252+148+166+334= 213+111+387+89=