Dau coroana de la 1 la 3
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1)
24x35=840
38x49=1862
56x93=5208
126x15=1890
320x24=7680
251x34=8534
140x60=8400
302x28=8456
2)
43x16+16x29=688+464=1152
43x16+16x29=16x(43+29)=16x72=1152
51x40-32x40=2040-1280=760
40x(51-32)=40x19=760
145x17-17x45=2465-765=1700
17x(145-45)=17x100=1700
270x30-270x25=8100-6750=1350
270x(30-25)=270x5=1350
3)
3x1628-107x32=4884-3424=1460
24x35=840
38x49=1862
56x93=5208
126x15=1890
320x24=7680
251x34=8534
140x60=8400
302x28=8456
2)
43x16+16x29=688+464=1152
43x16+16x29=16x(43+29)=16x72=1152
51x40-32x40=2040-1280=760
40x(51-32)=40x19=760
145x17-17x45=2465-765=1700
17x(145-45)=17x100=1700
270x30-270x25=8100-6750=1350
270x(30-25)=270x5=1350
3)
3x1628-107x32=4884-3424=1460
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