Question

a) 4 i 2/5 + 0,15 =

b) 12 i 1/4 - 6,7 =

c) 9,25 - 5 i 1/12 =

d) 14 i 4/7 - 2,75 =

e) 7 i 2/5 + 3 i 3/4 - 5,7 =

f) 8 i 1/2 - 6,32 + 2 i 3/8 =

g) 6 i 1/3 - (4,12 + 2,18) =

h) 5,68 - 1 i 3/4 + 2,12 - 5 i 9/14=

i) 5,8 - 5 i 8/9 + 3,4 - 3 i 3/27 =

Answer 1

a ) 4 i 2/5 + 0,15 = 4 i 2/5 + 15/100=4 i 40/100 + 15/100= 4 i 55/100=4.55
b)12 i 1/4 - 6,7=12.25-6.7=5.55
c) 9,25 - 5 1/12=925/100-5 i 1/12=9 i 1/4-5 i 1/12=9 i 3/12-5 i 1/12=4 i 2/12=4 i 1/6
d) 14 4/7 - 2,75= 14 i 4/7-2 i 75/100=14 i 4/7-2 i 3/4= 14 i 16/28-2 i 21/28=13 i 44/28-2 i 21/28=11 i 23/28
e)7 2/5 + 3 3/4 - 5,7= 7 i 8/20 + 3 i 15/20 - 5 i 14/20=6 i 28/20+3 i 15/20-5 i 14/20 = 4 i 29/20=5 i 9/20=5 i 45/100=5.45
f )8 1/2 - 6,32 + 2 3/8= 8 i 4/8- 6 i 8/25 +2 i 3/8=10 i 7/8-6 i 8/25=10 i 183/200 - 6 i 64/200=4 i 119/200
g) 6 1/3 - ( 4,12+2,18)= 6 i 1/3-1.94=6 i 1/3-1 i 94/100=6 i 1/3-1 i 47/50=6 i 50/150-1 i 141/150=5 i 200/150-1 i 141/150=4 i 59/150
h) 5,68 - 1 3/14 +2,12 - 5 9/14=7.8-1 i 3/14=7 i 4/5- 1 i 3/14= 7 i 74/70-1 i 56/70= 6 i 18/70=6 i 9/35
i ) 5,8 - 5 8/9 + 3,4 - 3 3/27= 9.2-5 i 8/9=9 i 1/5-5 i 8/9=9 i 9/45-5 i 40/45=8 i 54/45-5 i 40/45=3 i 14/45

 

 

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