Question

Zad 64 str 18 zbiór zadań kl 1 gimnazjum

a)5 1/2*(1,5)do potęgi 2 -4 4/7 :1 1/21

b)(3 3/4* 4/5-4,5:3,5):24

c)11 1/4* (1 2/3 -1 19/21*0,7)

d)4 1/8+(1,2-0,65):7 1/3

e)(2 1/3-1,6):(1,25 * 0,88)

f)3 1/3+1,25

3 1/3-1,25

g)25,92:7,2

3,02-2,9

zad 65 str 18 zbiór zadań kl 1 gimnazjum plisss bardzo ważne

Answer 1

a)5 1/2*(1,5)do potęgi 2 -4 4/7 :1 1/21 =

=5,5*2,25-32/7:22/21=

=12,375-32/7*21/22=

=12,375-672/154=

=12,375-336/77=

=12,375-48/11=

=12 3/8-4 4/11=

=99/8-48/11=

=1089/88-384/88=

=705/88=

=8 1/88

b)(3 3/4* 4/5-4,5:3,5):24=

=(3,75*0,8-45/10*10/35):24=

=(3-45/35):24=

=(3-9/7):24=

=(21/7-9/7)*1/24=

=12/7*1/24=

=12/168=

=1/14

c)11 1/4* (1 2/3 -1 19/21*0,7)=

=45/4*(5/3-40/21*7/10)=

=45/4*(5/3-280/210)=

=45/4*(5/3-4/3)=

=45/4*1/3=45/12=

=3,75

d)4 1/8+(1,2-0,65):7 1/3=

=33/8+0,55:22/3=

=33/8+55/100*3/22=

=33/8+11/20*3/22=

=33/8+33/440=

=1815/440+33/440=

=1848/440=

=4,2

e)(2 1/3-1,6):(1,25 * 0,88)=

=(7/3-8/5):(1,1)=

=(35/15-24/15)*10/11=

=11/15-10/11=10/15=

=2/3

f)3 1/3+1,25=10/3+5/4=40/12+15/12=55/12
  3 1/3-1,25=10/3-5/4=40/12-15/12=25/12

 

(55/12):(25/12)=55/12*12/25=55/25=11/5=2 1/5

g)25,92:7,2=3,6
  3,02-2,9=0,12

 

3,6:0,12= 30