Question

#1 1) 3/16-0,42= 2) 28/40+0,42= #2 1) 4*0,8*0,005

Answer 1

Ответ:

#1

1) -0.2325

2)1.12

#2

1) 0.016

Answer 2

#1

1. To solve the equation 3/16 - 0.42, we need to subtract 0.42 from 3/16. To subtract fractions, we need a common denominator. In this case, the common denominator is 16.

First, convert 0.42 into a fraction: 0.42 = 42/100 = 21/50

Now, we can subtract: 3/16 - 21/50

To find a common denominator, we can multiply the denominators together: 16 * 50 = 800.

Now, let's convert the fractions to have a common denominator of 800: (3/16) * (50/50) - (21/50) * (16/16) = 150/800 - 336/800

Subtracting the numerators: 150/800 - 336/800 = (150 - 336)/800 = -186/800

Therefore, 3/16 - 0.42 is equal to -186/800.

2. To solve the equation 28/40 + 0.42, we need to add 0.42 to 28/40. Again, we need a common denominator.

First, let's convert 0.42 into a fraction: 0.42 = 42/100 = 21/50

Now, we can add: 28/40 + 21/50

To find a common denominator, we can multiply the denominators together: 40 * 50 = 2000.

Now, let's convert the fractions to have a common denominator of 2000: (28/40) * (50/50) + (21/50) * (40/40) = 1400/2000 + 840/2000

Adding the numerators: 1400/2000 + 840/2000 = (1400 + 840)/2000 = 2240/2000

Simplifying the fraction: 2240/2000 = 112/100 = 28/25

Therefore, 28/40 + 0.42 is equal to 28/25.

#2

1. To solve the equation 4 * 0.8 * 0.005, we multiply the numbers together:

4 * 0.8 * 0.005 = 0.032

Therefore, 4 * 0.8 * 0.005 equals 0.032.