Question

Va rog ex 11dau coroana

Answer 1

a) 10÷x×1=5, 10/x=5, 10=5x, 5x=10, x=2.

verificarea; 1/2 din 10=5, 10÷2×1=5.

  12÷x×1=4,12/x=4, 12=4x, 4x=12, x=3.

ver;1/3din 12=4, 12÷3×1=4.

  49÷x×1=7,49/x=7, 49=7x, 7x=49, x=7.

ver;1/7 din49=7, 49÷7×1=7.

b) 100÷x×1=25, 100/x=25, 100=25x, 25x=100, x=4.

v;1/4 din 100=25,  100÷4×1=25.

   200÷x×1=20, 200/x=20, 200=20x, 20x=200, x=10.

v;1/10 din200 =20, 200÷10×1=20.

   300÷x×1=60, 300/x=60, 300=60x, 60x=300, x=5.

v; 1/5 din 300=60, 300÷5×1=60......

c) x÷4×1=6, x/4=6, x=24.

v;1/4 din24=6, 24÷4×1=6.

  x÷3×1=9, x/3=9, x=27.

v;1/3 din 27=9, 27÷3×1=9.

   x÷8×1=10, x/8=10, x=80.

v;1/8 din80=10, 80÷8×1=10.