Question

1. Oblicz.
/ = kreska ułamkowa
× = razy
a) 2/3×0 =
b) 2/3+0 =
c) 2/3×1
d) 2/3+1 =
e) 2/3-0 =
f) 0÷2/3 =
g) 7 4/5-1 1/5×2 1/2 =
2. Oblicz SPRYTNIE.
a) 2/5+4 3/7+3/5 =
b) 4 2/3+2 3/7+1/3+4/7 =
c) 2/5×3/4×10/27 =
d) 2 1/3×4 1/2×1 1/7 =

Proszę o szybką i poprawną odpowiedź.

Answer 1

a) 2/3×0 = 0
b) 2/3+0 = 2/3
c) 2/3×1 2/3
d) 2/3+1 = 1 i 2/3
e) 2/3-0 = 2/3
f) 0÷2/3 = 0
g) 7 4/5-1 1/5×2 1/2 = 7 4/5 - 6/5 * 5/2 = 7 4/5 - 3 = 4 4/5
2. Oblicz SPRYTNIE.
a) 2/5+4 3/7+3/5 = 4 3/7 + 5/5 = 4 3/7 + 1 = 5 3/7
b) 4 2/3+2 3/7+1/3+4/7 = 4 2/3 + 1/3 + 2 3/7 + 4/7 = 4 3/3 + 2 7/7 =
= 5 + 3 = 8
c) 2/5×3/4×10/27 = 6/20 * 10/27 = 3/18 = 1/6
d) 2 1/3×4 1/2×1 1/7 = 7/3 * 5/2 * 8/7 = 40/6 = 6 4/6 = 6 2/3