13915:23=605 3696:12=308 26880:32=840 706x319=225214 17238:34=507 7605:15=507 36540:87=420 405x82=33210
1.
23% = 23/100
50% = 1/2
<span>75% = 3/4
60% = 6/10 = 3/5
79% = 79/100
40% = 4/10 = 2/5
25% = 1/4
90% = 9/10
2.
7%
73%
3.
1/4 = 25%
25% < 37%
37% - больше
4.
(5/7)*70 = 50
(4/5)* 100 = 80
(3/5) *15 = 9
(3/10)*(1/10) = 3/100
5.
100%-54% = 46%
6.
400*0.15 = 60
7. 1)50*0.2 = 10
2) 50*0.2 + 50 = 60
</span>
Ответ:
Пошаговое объяснение:
√5²* 18 + √7² * 50 - √30² * 2 = √25 * 18 + √49 * 50 -√ 900 * 2 =
√450 + √2450 - √ 1800 = √1100 = 10 √11
Думаю, разберёшься в записях