Oblicz zamieniając ułamki zwykłe na dziesiętne.
b) 4,35- ³/₂₀₀
c) ⁷/₈ - 0,78
d) 5,4 - ⁵/₄
e)1⅖ - 0,85 + 3 ⁷/₂₀
f) 3 ³/₂₅ - (0,8- ¼)
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b) 4,35- ³/₂₀₀= 4.35-15/1000=4.35-0.015=4.335
c) ⁷/₈ - 0,78= 875/1000-0.78=0.875-0.78=0.095
d) 5,4 - ⁵/₄= 5.4-125/100=5.4-1.25=4.15
e)1⅖ - 0,85 + 3 ⁷/₂₀= 1 i 4/10-0.85+3 i 35/100=1.4-0.85+3.35=3.9
f) 3 ³/₂₅ - (0,8- ¼)= 3 i 12/100-(0.8-25/100)=3.12-(0.8-0.25)=3.12-0.55=2.57