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10.calculati:d)5 supra 18x5 intreg 2 supra 5+16 supra 25x5 supra 24;e)2 intreg 13 supra 16x2 supra 27-4 supra 15x5 supra 24,dau coroana!

Răspuns :

Renatemambouko
d)5/18x5 intreg 2/5+16/25x5/24=
=5/18x27/5+2/5x1/3=
=3/2+2/15=
=(45+4)/30=
=49/30=
=1,6(3)



e)2 intreg 13/16x2/27-4/15x5/24=
=45/16x2/27-1/3x1/6=
=5/8x1/3-1/18=
=5/24-1/18=
=(15-4)/72=
=11/72=
0,152(7)




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