发布时间 : 星期四 文章应用加法交换律和结合律简便计算练习更新完毕开始阅读15a9711f5afb770bf78a6529647d27284a733772
13++687+62= 6+(157+94)= 499+16+284+101= 120+(229+80)= 265+435+91+9= 374+62+38+26= 135+(683+65)= 318+(229+382)= 260+(322+40)= 184+216+103+97= 46+254++161= 127+73+259+141= 221+479+46+54= 82+(167+18)= 102+42+498+58= 98+33+167+102= 388+12+188+312= 312+288+82+118= 361+(221+239)= 594+108+92+106= 218+(638+82)= 22+152+248+78= 405+(473+95)= 410+389+11+90= 109+591+82+118=
48++52+214= 69+69+231+31= 175+354+25+346= 129+71+118+282= 83+100+200+17= 76+(423+24)= 364+35+65+236= 82+(410+18)= 97+(21+3)= 92+53+47+108= 95+(610+5)= 113+(105+87)= 8+(326+392)= 483+117+178+22= 165+(327+135)= 308+165+35+292= 487+295+5+13= 164+153+36+447= 352+248+43+257= 307+150+50+93= 92+(555+108)= 307+(168+393)= 113+60+387+40= 84+386+14+216= 154+46+562+38=
199+174+1+526= 619+(144+81)= 72+146+554+128= 90+168+332+110= 347+(403+153)= 84+(899+16)= 450+150+196+104= 121+371+29+379= 171+11+89+429= 169+51+431+49= 531+(140+169)= 78+100+500+122= 23+205+395+277= 228+172+148+252= 190+10+634+66= 66+65+35+234= 518+92+8+182= 28+572+49+151= 244+(482+56)= 98+402+58+142= 131+(739+69)= 33+(515+267)= 96+4+241+59= 473+114+27+286= 8+692+79+21=
187+13+154+46= 49+(619+251)= 584+(204+16)= 10+390+337+63= 63+(347+337)= 348+(59+252)= 68+148+452+132= 91+(560+109)= 229+438+71+62= 149+(132+551)= 220+(312+)= 337+50+50+263= 45+316+284+55= 5+15+185+395= 59+84+716+41= 365+35+172+228= 122+105+78+395= 591+82+218+9= 118+198+282+2= 14+(104+86)= 464+36+236+164= 237+363+169+31= 12+88+400+100= 546+(313+54)= 122+378+181+19=
463+72+128+237= 30+(451+70)= 515+85+37+263= 310+(237+290)= 154+53+47+46= 154+53+47+46= 109+60+391+140= 106+594+133+67= 200+26+74+400= 101+63+599+137= 135+32+68+465= 41+(326+59)= 106+(59+494)= 5+95+244+56= 7+(150+93)= 162+(465+38)= 266+27+134+73= 178+84+416+222= 104+54+146+596= 323+156+277+44= 67+233+10+90= 374+115+185+126= 80+20+370+230= 174+375+26+25= 32+168+172+28=
232+(342+368)= 49+399+101+151= 575+183+17+125= 683+162+17+38= 37+(243+563)= 47+122+278+453= 161+264+39+136= 69+231+256+44= 13+202+98+287= 505+84+195+116= 15+90+385+10= 75+525+67+33= 75+(295+325)= 100+300+172+28= 272+428+37+163= 145+(104+455)= 149+(358+151)= 222+(+178)= 275+(231+125)= 208+27+92+73= 178+(733+22)= 2+261+498+39= 59+148+152+41= 50+(251+50)= 378+59+41+222=
107+(491+293)= 387+113+145+55= 35+366+65+134= 6+(210+94)= 87+13+7+793= 428+172+190+110= 75+93+425+307= 204+26+74+496= 11+393+107+289= 241+59+370+30= 20+269+131+380= 77+(504+323)= 20+(119+80)= 162+338+208+192= 50+(156+350)= 161+(151+39)= 554+256+44+46= 566+174+34+26= 40+26+74+160= 99+105+401+295= 128+87+113+472= 61+564+236+39= 146+(71+54)= 222+249+251+178= 3+29+71+297=
23+(61+477)= 79+(603+21)= 59+41+37+63= 156+(459+44)= 106+(651+94)= 596+(78+104)= 113+387+22+278= 84+(751+116)= 191+(746+9)= 202+363+198+137=179+21+157+43= 410+18+290+182= 202+(172+498)= 318+15+82+85= 55+293+107+245= 356+99+44+101= 359+20+80+341= 458+(294+142)= 93+(488+207)= 167+29+371+133= 353+66+47+34= 361+108+39+92= 30+96+470+104= 23+590+110+177= 56+(294+544)=