Question

Prosze o wykonanie!!! Zad 74

Answer 1

A)(2/3+1/2)x2/15=(4/6+3/6)x2/15=7/6x2/15=7/45
b)4 1/2x(3/4+1/3)=9/2x(9/12+4/12)=9/2x13/12=39/8=4 7/8
c)(2 1/6-1 1/3)x2 2/5=(13/6-4/3)x12/5=(13/6-8/6)x12/5=5/6x12/5=1x2=2
d)2 2/7x7-(3 1/2)²=16/7x7-(7/2)²=16-49/4=64/4-49/4=15/4=3 3/4
e)(2 1/2-1 1/3)²-(5/6)²=(5/2-4/3)²-25/36=(15/6-8/6)²-25/36=(7/6)²- 25/36= 49/36-25/36=24/36=4/6=2/3
f)(1 1/2)³x(2/3)³-1/5x2 1/6=(3/2)³x8/27-1/5x13/6=27/8x7/27-13/30=1-13/30 =30/30-13/30=17/30