Question

1) а) 0,2 км + 210 м =б) 32км + 0,3 ц =2)1 - 3/11 =7 - 8/11 =3)а) 4 6/19 - x = 2 7/19б) y + 5 16/23 = 7 11/235-9 класс!​

Answer 1

a) 0.2 km + 210 m = 0.2 km + 0.21 km = 0.41 km b) 32 km + 0.3 centners = 32 km + 30 centners = 32 km + 3000 kg = 32 km + 3000/1000 km = 32.003 km

1 - 3/11 = (11/11) - (3/11) = 8/11

7 - 8/11 = (77/11) - (8/11) = 69/11

a) 4 6/19 - x = 2 7/19

To solve this equation, we need to subtract 2 7/19 from 4 6/19: 4 6/19 - 2 7/19 = (4 - 2) + (6 - 7)/19 = 2 - 1/19 = 38/19 - 1/19 = 37/19

So, the equation becomes: 37/19 - x = 0

To isolate x, we can subtract 37/19 from both sides: 37/19 - 37/19 - x = 0 - 37/19 -x = -37/19

Multiplying both sides by -1, we get: x = 37/19

b) y + 5 16/23 = 7 11/235

To solve this equation, we need to subtract 7 11/235 from 5 16/23: 5 16/23 - 7 11/235

First, let's convert both mixed numbers to improper fractions: 5 16/23 = (5 * 23 + 16)/23 = 121/23 + 16/23 = 137/23 7 11/235 = (7 * 235 + 11)/235 = 1645/235 + 11/235 = 1656/235

Now, let's subtract: 137/23 - 1656/235

To subtract fractions, we need a common denominator. The least common multiple of 23 and 235 is 5395.

137/23 * (235/235) = 31795/5395 1656/235 * (23/23) = 38388/5395

Now we can subtract: 31795/5395 - 38388/5395 = (31795 - 38388)/5395 = -6593/5395

So, the equation becomes: y - 6593/5395 = 0

To isolate y, we can add 6593/5395 to both sides: y - 6593/5395 + 6593/5395 = 0 + 6593/5395 y = 6593/5395

5-9 classes!