Question

39/203÷78/145 121/140×350/363 ,45/64÷81/96,25/49×21/50

Answer 1

Надеюсь, что всё понятно

Answer 2

To solve the given expressions, we'll simplify each one step by step. Let's go through them:

1. 39/203 ÷ 78/145: To divide fractions, we multiply the first fraction by the reciprocal of the second fraction: (39/203) ÷ (78/145) = (39/203) × (145/78)

Next, we can simplify the fraction by canceling out common factors: (39/203) × (145/78) = (3/7) × (5/2) = (3 × 5) / (7 × 2) = 15/14

Therefore, 39/203 ÷ 78/145 simplifies to 15/14.

2. 121/140 × 350/363: We can multiply the fractions directly: (121/140) × (350/363) = (121 × 350) / (140 × 363)

Next, we simplify the fraction: (121 × 350) / (140 × 363) = 42350 / 50820

This fraction can be further simplified by dividing both the numerator and denominator by their greatest common divisor, which is 10: 42350 / 50820 = 4235 / 5082

3. 45/64 ÷ 81/96: Again, we'll multiply the first fraction by the reciprocal of the second fraction: (45/64) ÷ (81/96) = (45/64) × (96/81)

Next, we simplify the fraction: (45/64) × (96/81) = (15/32) × (32/27) = (15 × 32) / (32 × 27) = 480 / 864

This fraction can be simplified by dividing both the numerator and denominator by their greatest common divisor, which is 48: 480 / 864 = 10 / 18

4. 25/49 × 21/50: We can multiply the fractions directly: (25/49) × (21/50) = (25 × 21) / (49 × 50) = 525 / 2450

This fraction can be simplified by dividing both the numerator and denominator by their greatest common divisor, which is 25: 525 / 2450 = 21 / 98

So, the final results are:

1. 39/203 ÷ 78/145 = 15/14
2. 121/140 × 350/363 = 4235/5082
3. 45/64 ÷ 81/96 = 10/18
4. 25/49 × 21/50 = 21/98