Question

Решить 3 430+ (2-1 115):49+13

Answer 1

3 4/30 + (2 - 1 1/15) : 4/9 + 1/3 = 5 целых 17/30

1) 2 - 1 1/15 = 1 15/15 - 1 1/15 = 14/15

2) 14/15 : 4/9 = 14/15 · 9/4 = (7·3)/(5·2) = 21/10 = 2 1/10

3) 3 4/30 + 2 1/10 = 3 4/30 + 2 3/30 = 5 7/30

4) 5 7/30 + 1/3 = 5 7/30 + 10/30 = 5 17/30

Answer 2

3 4/30+(2-11/15):4/9+1/3
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1) 2-11/15=19/15
2) 19/15:4/9=19/15•9/4=57/40
3) 3 4/30+57/40=94/30+57/40=547/120
4) 547/120+1/3=587/120=4 107/120
Ответ:4целых 107/120