Question

Dzałania na liczbach

a) (3,75+1 3/8):2
b)(1,25-2 2/3)• 6
c)2/7-3 1/8 • 2,4
d)- 1,6: 3 11/15 +1 3/14
e)(0,3 +4/5):(6 1/15-2/3)
f) -2,4-3,6• (1 3/8: 3/3-5/9)

Answer 1

A) (3,75+1 3/8):2 = 5,125:2 = 2,5625
b)(1,25-2 2/3)• 6 = (1 1/4 - 2 2/3)*6 = (5/4 - 8/3)*6 = (15/12 - 32/12)*6 = -17/12 *6 = - 17/2 = - 8 i 1/2
c)2/7-3 1/8 • 2,4 = 2/7 - 3,125 *2,4 = 2/7-7,5 = 0,29-7,5 = -7,21
d)- 1,6: 3 11/15 +1 3/14 = - 1,6 : 3,73 + 1,21 = - 0,43 +1,21 = 0,78
e)(0,3 +4/5):(6 1/15-2/3) = 1,1 : (6,07-0,7) = 1,1 : 6 = 0,183
f) -2,4-3,6• (1 3/8: 3/3-5/9) = - 6 * (1,375: 1 - 0,55) = -6*0,825 = -4.95

Answer 2

A) 2 9/16
b) -51
c) - 101/14
d) 1 5/7
e) 33/162
f) - 107/20

Answer 3

A) (3,75 + 1 3/8):2= 2 9/16