zamień ułamki dziesiętne na ułamki zwykle i oblicz a) 2/3+0,25 b)0,75-3/7 c) 2 1/3:0,28 d)2,8+1 3/4 oblicz ; a)2,5+2*1/2 1,2-(0,1+2/5) 0,4*1/4+7 4,4:4+1/4 b) 2/5:(2*0,5) 2/3*6:1/4 (0,5+1/2)*2 7,2-1/8*24 błagam pomocy na dziś
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a) 2/3 + 1/4 = 8/12 + 3/12 = 11/12
b) 3/4 - 3/7 = 21/28 - 12/28 = 9/28
c) 21/3 : 7/25 = 21/3 * 25/7 = 25
d) 14/5 + 7/4 = 56/20 + 35/20 = 91/20
a)2,5+2*1/2 = 2,5+1 = 3,5
1,2-(0,1+2/5)=1,2-(1/10+4/10)=1,2-(1/2)=1,2-0,5=0,7
0,4*1.4+7=0,56+7= 7,56
4,4:4+1/4= 1,1 + 0,25= 1,35
b)2/5:(2*0,5)=2/5:1=2/5
2/3*6:1/4=12/3 : 1/4= 4: 1/4= 4 * 4=16
(0,5+1/2)*2=1*2=2
7,2-1/8*24=7,2-0,125*24= 7,2 - 3= 4,2