Question

Calculează, alegând convenabil termenii adunării:
a) 99+46+198+1+54+2
b) 495+572+612+5+388+328 c) 1485+2784+1515+3216 d)1+97+2+96+99+3+4 ​

Answer 1

Răspuns:

a) (99+1)+(46+54)+(198+2)=100+100+200=400

b)(495+5)+(572+328)+(612+328)=500+900+1000=2400

c)1485+1515)+(2784+3216)=3000+6000=9000

d)(1+99)+(97+3)+(96+4)+(2+98)=100+100+100+100=400