Question

buna dimineața matematica​

Answer 1

Explicație pas cu pas:

1) 72×29= 72 ×20 + 72 × 9=

=1440 + 648= 2088

2) 163 ×34=

= 100×34 +60 ×34+3×34=

=3400+340×6+90+12=

=3400+1800+240 +102=

=5200+ 342=5542

3) 258 ×45=

=200 ×45 + 50 ×45 + 8×45=

=9000 +2250 + 360=

=11250+ 360= 11610

Answer 2

Răspuns:

1. 72x29=2088

2. 163x34=5542

3. 258x45=11610

Succes ..