Question

Plis pomozcie daje naj

Answer 1

1.

a) 1/2 * 4² :8 = 1/2 * 16 : 8 = 8 :8 = 1
b) (1/2)² :8 *4 = 1/4 :8 *4 = 1/32 * 4 = 1/8 = 0,125
c) 8 : 4 * (1/2)² = 8 :4 * 1/4 = 2 * 1/4 = 1/2 = 0,5
d) (8:4)² * 1/2 = (2)² * 1/2 = 4 * 1/2 = 2

2.

a) 3/4 + 0,75 * 1 1/3 = 3/4 + 3/4 * 4/3 = 3/4 + 1 = 1,75 
b) 3,7 - 1,2 : 1/2 = 3,7 - 12/10 * 2/1 = 3,7 - 2,4 = 1,3
c) 5 * 0,3 + 3 * 2/5 = 1,5 + 1,2 = 2,7
d) 1,2 : 1/3 - 1,4 * 2/7 = 6/5 * 3 - 7/5 * 2/7 = 3,6 - 0,4 = 3,2

3.

a) 1/2 * (4/5 +1,2) =1/2 * 2 = 1
b) (3/4 -1/5) : 0,5 = (15/20 - 4/20) : 1/2 = 11/20 * 2 = 1,1
c) ( 1 1/5 - 0,5) * 3 1/3 = (1,2 - 0,5) * 3 1/3 = 0,7 * 3 1/3 = 7/10 * 10/3 = 7/3 = 2 1/3
d) (5,6 - 3,1) : 3 1/2 = 2,5 * 2/7 = 5/2 * 2/7 = 5/7

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