0.84 () 0.2 = 0.6 () 7 2.5 () 5 = 0.025 () 0.05 3.9 () 0.6 = 9 () 0.5 fill in the operation symbol

0.84 () 0.2 = 0.6 () 7 2.5 () 5 = 0.025 () 0.05 3.9 () 0.6 = 9 () 0.5 fill in the operation symbol

0.84/0.2=0.6*7 ==4.2 2.5/5=0.025/5 ==0.5 3.9+0.6=9*0.5 ==4.5
Remember to adopt it