Question

Calculeaza dupa model,grupand convenbil termenii.

Answer 1

a)   50 + 25 + 20 + 75 + 30 = 200

= ( 50 + 20 + 30 ) + ( 25 + 75 ) =

= 100 + 100 =

= 200

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b) 50 + 75 + 100 + 225 + 150 = 600

= ( 50 + 150 ) + ( 75 + 225 ) + 100 =

= 200 + 300 + 100 =

= 600

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c)   1 500 + 682 + 3 500 + 318 = 5 000

= ( 1 500 + 3 500 ) + ( 682 + 318 ) =

= 5 000 + 1 000 =

= 6 000