Ułamki ... Oblicz :
1) Jedna cała i jedna trzecia + 2,25 = ?
2) 6,93 : trzy piąte = ?
3) ( 6,5- 4,7) : jedna cała i cztery piąte= ?
4) 0,64 * siedem ósmych = ?
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1) 1i 1/3 + 2,25 = = 4/3 + 225/100 = 4/3 + 9/4 = 16/12 + 27/12 = 43/12 = 3 i 7/12
2) 6,93 :3/5 = 693/100 : 3/5 = 693/100 * 5/3 = 231/20 = 11 i 11/20
3) ( 6,5- 4,7) : 1 i 4/5= 1,8 : 9/5 = 18/10 * 5/9 = 2/2 = 1
4) 0,64 * 7/8 = 64/100 * 7/8 = 56/100 = 14/25
1) 1i1/3+2,25= 1i1/3 +2i25/100= 1i100/300 + 2 i75/300= 3 i 175/300 = 3 i35/60
= 3 i 7/12
2) 6,93: 3/5 = 6,93 : 0,6 = 11,55
3) (6,5 -4,7) : 1 i4/5 = 1,8 : 1,8 = 1
4) 0,64 * 7/8 = 0,64 * 0,875 = 0,56