POZIOM PODSTAWÓWKI (zadanie siostry, proszę o szybką odpowiedź!)
Rozwiąż równanie i sprawdź rozwiązanie;
a) 12 * a = 13 1/3
b) b : 4 1/2 = 3 2/3
c) 2 5/6 : c = 4 1/4
d) 2 2/5 * d = 9
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a)12 * a = 13 1/3
12*a= 40/3 |:12
a= 10/9
a=1 1/9
b) b : 4 1/2 = 3 2/3
b: 9/2 = 11/3
b* 9/2 = 11/3 |*2/9
b= 22/27
c) 2 5/6 : c = 4 1/4
17/6 :c = 17/4 |*c
17/6= 17/4 *c |* 4/17
c= 2/3
d) 2 2/5 * d = 9
12/5 *d =9 |*5/12
d= 3 1/4
a)12·a=13 1/3
12a=40/3 /÷12
a=480/3
a=160
b)b÷4 1/2=3 2/3
b÷9/2 =11/3 /·9/2
b=99/6
b=16.5
c)2 5/6÷c=4 1/4
17/6÷c=17/4 /·c
17/6=17/4·c /÷17/4
17/6·4/17=c
c=4/6
d)2 2/5 ·d=9
12/5·d=9 /÷12/5
d=9·5/12
d=3,75