Question

Oblicz !

a) 5 5/7 : 1,4= ?

b)8 1/6 : 0,21 = ?

c) 6 1/7 * 5,25 = ?

d) 6,25 : 1 1/7 =?

e) 5 5/6 * 0,12 = ?

f) 4,25 : 3 1/5 = ?

g) ( 1 - 5/7 )* 0,49 = ?

h) 2,4* 1/3+ 4,8 : 2 2/5= ?

i)13 8/10 - 3 3/4 =?

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Answer 1

a) 5i5/7:1,4=40/7:1,4=200/49

b) 8i1/6:0,21=49/6:0,21=350/9

c) 6i1/7*5,25=43/7*5,25=32,25

d) 6,25:1i1/7=6,25:8/7=175/32

e) 5i5/6*0,12=35/6*0,12=0,7

f) 4,25:3i1/5=4,25:16/5=4,25:3,2=85/64

g) (1-5/7)*0,49=2/7*0,49=0,14

h) 2,4*1/3+4,8:2i2/5=0,8+4,8:2i2/5=0,8+4,8:12/5=0,8+4,8:2,4=0,8+2=2,8

i) 13i8/10-3i3/4=69/5-3i3/4=69/5-15/4=13,8-15/4=13,8-3,75=10,05

Answer 2

a) 5 5/7 : 1,4 = 40/7 : 7/5 = 40/7 * 5/7 = 200/49

b)8 1/6 : 0,21 = 49/6 : 21/100 = 49/6 * 100/21 = 4900/126 = 350/9

c) 6 1/7 * 5,25 = 43/7 * 21/4 = 903/28 = 129/4

d) 6,25 : 1 1/7 = 25/4 : 8/7 = 25/4 * 7/8 = 175/32

e) 5 5/6 * 0,12 = 35/6 * 3/25 = 105/150 = 7/10

f) 4,25 : 3 1/5 = 17/4 : 16/5 = 17/4 * 5/16 = 85/64

g) ( 1 - 5/7 )* 0,49 = ( 1/1 - 5/7 )* 0,49 = ( 7/7 - 5/7 )* 0,49 = 2/7 * 49/100 = 98/700 = 7/50

h) 2,4* 1/3+ 4,8 : 2 2/5 = 12/5 * 1/3 + 24/5 : 12/5 = 12/15 + 24/5 * 5/12 = 12/15 + 120/60 = 12/15 + 30/15 = 42/15 = 14/5

i)13 8/10 - 3 3/4 = 138/10 - 15/4 = 552/40 - 150/40 = 402/40 = 201/20