1․ 51X4=(50+1)x4=(51X4)X4=50X4+1X4=200+4=204
2. 27X5=(20+7)X5=20+5+7X5=100+35=135
3. 6X35=(30+5)X6=30:6+5X6=180+30=210
4. 7X3+7X5+7X2=(3+5+2)X7=70
5. 4X9+4X11+4X3=(9+11+3)X4=92
6. 25=5X2+5X3=46
7. 3X6+3X6=364
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Մարիաննա Խաչատրյանի բլոգ 