Question

1) Efectuati si scrieti rezultatul in forma fractionara :

a) 2,51×0,(2)=
b) 12×0,2 (3)×4 intregi si 1/2=
c) 18×3 intregi si 1/5=
d) 7,1×11/4=
e) 3 intregi si 1/4×0,25×1/9=
f) 2,(5)×9/20×0,3=
g) 7 intregi si 1/4×2,(3)×5
h) 9/10×0,2 (5)=

Answer 1

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Answer 2

a) 2,51×0,(2)=251/100×2/9=251/450

b) 12×0,2 (3)×4 intregi si 1/2=
=12×(23-2)/90×9/2=
=12×21/90×9/2=
=14/5×9/2=7/45

c) 18×3 intregi si 1/5=
= 18× 16/5=288/5

d) 7,1×11/4=
=71/10×11/4=
=781/40

e) 3 intregi si 1/4×0,25×1/9=
=13/4×1/4×1/9=13/144

f) 2,(5)×9/20×0,3=
=(25-2)/9×9/20×3/10=
=23/20×3/10=
=69/200

g) 7 intregi si 1/4×2,(3)×5=
=29/4×(23-2)/9×5=
=29/4×21/9×5=
=29/4×7/3×5=
=1015/12

h) 9/10×0,2 (5)=
=9/10×(25-2)/90=
=9/10×23/90=
=1/10×23/10=
=23/100