Răspuns:
1. 324=300 +20+4
2.957=900+50+7
3. 905=900+5
4.763=700+60+3
2.10+10=20 : 5 =4 5*4=20 R: c)20
3. ia=scadere
produsul numerelor 123 si 10 =1230
inzecitul celui mai mare nr =90 *10 =900
1230-900=330
4. 12*10=120
100*10=1000
362*10=3.620
23*100=2300
10*723=7230
120*10=1200
5.209*10=2090+209=2299 R:suma lor
6.10*10=100 100*10=1000 * 3 =3000
7.2*10*5=100 100*92=9200:92=100
8.400:2=200 200:4=50 R: a)400
