Question

Olicz;

45-(-13)+(-⁸⁴/₂)=

1⅘:(-0,2)×0,3=

-6+6×(1,5-2½)=

-2,4׳/₇-4,6׳/₇=

Oblicz 54% z liczby a

a=[⅔×(¹/√4- 3⅔×1,5)]×√4/25

Answer 1

5-(-13)+(-⁸⁴/₂)=
= 5 + 13 - 42 =
= 18 - 42 =
= -24
===================================

1⅘:(-0,2)×0,3=

= 9/5 : (-2/10) * 0,3 =
= 9/5 * (-5) * 0,3 =
= 9 * (-1) * 0,3 =
= -9 * 0,3 =
= -2,7
===================================
-6+6×(1,5-2½)=
= -6 * 6 * (15/10 - 2,5) =
= -36 * (15/10 - 25/10) =
= -36 * (-1) =
= 36
====================================

-2,4׳/₇-4,6׳/₇ =
= -24/10 * 3/7 - 46/10 * 3/7 =
= 72/70 - 138/70 =
= -66/70 =
= -33/35
====================================

a=[⅔×(¹/√4- 3⅔×1,5)]×√4/25
a = [2/3 * (1/2 - 11/3 * 1 1/2)] * 2/5
a = [2/3 * (1/2 - 11/3 * 3/2)] * 2/5
a = [2/3 * (1/2 - 11/2)] * 2/5
a = [2/3 * (-10/2)] * 2/5 =
a = -10/3 * 2/5
a = -4/3
a = - 1 1/3
---------------------------
54% * (-4/3) =
= 0,54 * (-4/3) =
= 54/100 * (-4/3) =
= - 54/75