5 ,oblicz dzialania wedlug wzoru 43-5=43-3-2=40-2=38 54-8= 86-7= 6. 43-5=43-10+5=33=5=38 54-8= 86-7= 7.oblicz dzialanie wybranym przez siebie sposobem , 75-9= 62-4= 97-9= 52-3=

54-8=54-4-4=50-4=46 86-7=86-6-1=80-1=79 6. 54-8=54-10+2=44+2=46 86-7=86-10+3=76+3=79 7. 75-9=75-5-4=70-4=66 62-4=62-2-2=60-2=58 97-9=97-10+1=87+1=88 52-3=52-10+7=42+7=49

zad.5 54-8=54-4-4=50-4=46 86-7=86-6-1=80-1=79 zad.6 54-8=54-10+2=44+2=46 86-7=86-10+3=76+3=79 zad.7 75-9=75-5-4=70-4=66 62-4=62-2-2=60-2=58 97-9=97-7-2=90-2=88 52-3=52-2-1=50-1=49