应用加法交换律和结合律简便计算练习
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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)=