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calculeaza grupând convenabil factorii
8x7x0
7x4x2
2x9x5

3x 7x2
5x10x5
10x 9x9

5x8x2
4x9x2
2x3x7


Răspuns :

1)8x7x0=0,7x4x2=46,2x9x5=90;2)3x7x2=42,5x10x5=250,10x9x9=180;3)5x8x2=80,4x9x2=42,2x3x7=42