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Question

Re-arrange suitably and find the sum in each of the following :

(i)1112+173+112+252

(ii)67+56+49+157

(iii)35+73+95+1315+73

(iv) 413+58+813+913

(v)23+45+13+25

(vi) 18+512+27+712+97+516

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Solution

(i)1112+173+112+252=(1112+173)+(112+252)=116812+11252=5712+142=578412=14112

(ii)67+56+49+157=(67+157)+(56+49)=6157+15818=217+2318=373161126=539126=539÷7126÷7=7718

(iii)35+73+95+1315+73=(35+95)+(73)+1315=3+95+773+1315=125+0+1315=125+1315=361315=2315

(iv)413+58+813+913=413+813+913+58=48+913+58=513+58=4065104 (LCM of 13,8=104)=25104

(v) 23+45+13+25=(23+13)+(45+25)=2+13+4+25=33+25=1+25=525=35

(vi)18+512+27+712+97+516=(18+516)+(512+712)+(27+97)=2516+5+712+2+97=316+1212+117=316+1+117=21+112+176112=21+288112=267117


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