#1 1/7х+3/14х=14 3 1/5•х=1 7/9 #2 2 5/7: 38=? 1 5/8•1 - вопрос №503520411731414315179225738158135215231556 от vittoriakostenk 29.10.2020 18:40

Question

Математика: #1 1/7х+3/14х=14 3 1/5•х=1 7/9 #2 2 5/7: 38=? 1 5/8•1 3/5=? 2 1/5: 2 3/15=? 5/6•3=?

vittoriakostenk · Answer

1→1/7х+3/14х=142/14х+3/14х=145/14х=14х=14/1:5/14х=196/5=39,2     3 1/5х=1 7/916/5х=16/9х=16/9:16/5х=5/92→2 5/7:38=19/7:38/1=19/7*1/38=1/141 5/8*1 3/5=13/8*8/5=13/5=2 3/52 1/5:2 3/15=11/5:33/15=11/5*15/33=15/6*3=5/2=2,5...