Question

Grupeaza termeniiconvenabil si calcueaza.
model: 235+137+65+63=
=(235+65)+(137+63)
=300+200
=500
exercitiu: 350+139+150+161=
230+155+270+345=
222+150+378+250=

Answer 1

1. 350+139+150+161=
(350+150)+(139+161)=
500+300=800
2. 230+155+270+345=
(230+270)+(155+345)=
500+500=1000
3. 222+150+378+250=
(222+378)+(150+250)=
600+400=1000

Sper ca am ajutat:)

Answer 2

1. 350+139+150+161=800
=(350+139)+(150+161)
= 489+311
=800

2. 230+155+270+345=1000
=(230+155)+(270+345)
=385+615
= 1000

3. 222+150+378+250=1000
=(222+150)+(378+250)
=372+628
=1000