Question

2 și 3 va rog mult repede

Answer 1

ex. 2.  9:2=4.5;  13:4=3,25 ; 4:8=0,5; 12:8=1.5; 7:5=1.4; 36:5=7.2 ; 45:4=11.25; 4:5=0.8.
ex.3.  45:180=0.25 prob.0.25×180=45; 360:288=1.25prob.1.25×288=360;  475:152=3.125 prob.3.125÷152=475;  75:12=6.25prob.6.25×12=75;   63:14=4.5prob.4.5×14=63;  81:15=5.4 prob.5.4×15=81; 750:24=31.25prob. 31.25×24=750.