Question

Cwiczenie 6 str.82.Matematyka wokoł nas kl.5 Oblicz: a) 10:2/3*1 1/2= b)12*2 3/4:2 3/4= c)4 1/2:1 1/2-1 3/4= d)20-6 3/4:4 1/2= proszę na pomoc to pilne NA JUTRO daję naj !

Answer 1

a co to 2/3*1 co znaczy *

  a)
10:2/3 *1 1/2=10*3/2*3/2=45/2=22 1/2
b)
12 * 2 3/4 : 2 3/4 =12*11/4:11/4=33*4/11=12
c)
4 1/2 : 1 1/2 - 1 3/4 =9/2:3/2-1 3/4=9/2*2/3-1 3/4=3 - 1 3/4=1 1/4
d)
20 - 6 3/4 : 4 1/2 = 20-27/4:9/2=20-27/4*2/9=20-3/2=20-1 1/2=18 1/2

 

oki

 

 

Answer 2

a)10:2/3*1 1/2=10/1*3/2*3/2=90/4=22 2/4=22 1/2

b)12*2 3/4:2 3/4=12/1*11/4*4/11=12/1=12

c)4 1/2:1 1/2-1 3/4 =9/2*2/3-7/4=18/6-7/4=36/12-21/12=15/12=1 3/12=1 1/4

d)20-6 3/4:4 1/2=20/1-27/4*2/9=20/1-54/36=360/18-27/18=333/18=18 1/2