1)78.6- 12.38+7.62=65.22+7.62=72.84

(2)5.69-3.45- 1.55 =2.24- 1.55=0.69

(3)49.36-(9.36+ 10.5 1)=49.36-9.36- 10.5 1=40- 10.5 1=29.49

(4)7.6-(4.99-4.7)+0.78=7.6-0.29+0.78=8.09

(5)13.4+0.5-13.4+0.5 =13.4-13.4+0.5 =1need hi me.