Question

folosind proprietatile adunarii (asiociavitatea si comutivitatea), calculati:
a) 2+3+97+98=
b) 5+13+19+87+95+1=
c) 16+184+982+118+66+134=
d) 355+129+678+645+322+871=​

Answer 1

Răspuns:

Explicație pas cu pas:

a) 2+3+97+98= 200

= (2+98) + (3+97) =

= 100 + 100 =

= 200

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b) 5+13+19+87+95+1= 220

= ( 95 + 5) + (13+87) + (19+1) =

= 100 + 100 + 20 =

= 220

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c) 16+184+982+118+66+134= 1 500

= (16+184) + (982+118) + (66+134) =

= 200 + 1 100 + 200 =

= 1 500

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d) 355+129+678+645+322+871=​ 3 000

= (355+645) + (129+871) + (678+322) =

= 1 000 + 1 000 + 1 000 =

= 3 000