вычислите 39.62*0.1 2.5 *4.87 3.6 *0.001 0.5:100 64.2 : 3.2

Question

вычислите 39.62*0.1 2.5 *4.87 3.6 *0.001 0.5:100 64.2 : 3.2

Answer 1

39.62*0.1
39.62
* 0.1
______
3,962

2.5 *4.87
4,87
* 2,5
_____
2435
874
______
11,175

3.6 *0.001
0,001
* 3,6
_______
0,0036

0.5:100
5/10 : 100= 5/10 * 1/100 = 5/1000 = 0,005

64.2 : 3.2
64 2/10 : 3 2/10= 642/10 : 32/10= 642/10 * 10/32= 642/32=20 2/32= 20 1/16 (или 20,0625)