4,36/(3,15+2,3)+(0,792-0,78)*350

4,36/(3,15+2,3)+(0,792-0,78)*350 =5.1) 3.15 + 2.3= 3+0.15+2+0.3=5+ 0.45= 5.45.2) 0.792-0.78 = 0.012.3)436/ 100 ÷ 545/ 100 = 109·4/ 25·4 ÷ 109·5/ 20·5 = 109 /25 ÷ 109/ 20 = 109 /25 × 20/ 109 = 109·20/ 25·109 = 2180/ 2725 = 4·545/ 5·545 = 4 /5 = 0.8.4)350 × 12 /1000 = 350 × 3·4/ 250·4 = 350 × 3/ 250 = 350·3 /250 = 1050 /250 = 21·50 /5·50 = 21/ 5 = 1 + 4·5/ 5 = 4 1/ 5 = 4.2.5) 4.2 + 0.8 = 5.