Question

3-2 7/15 и 4-(-2 1/4)

Answer 1

3-2 7/15 = 3-37/15 = 45/15-37/15 = 8/15

Возводим дробь в неправильную, домножаем 3 до "3"  и вычитаем.

4-(-2 1/4) = 4+2 1/4 = 4+9/4 = 16/4+9/4 = 25/4 = 6 1/4

"-" да "-" дает "+", после возводим аналогично в неправильную дробь, домножаем 4 на "4" и вычисляем. После неправильную дробь превращаем в правильную.

Answer 2

To subtract mixed numbers, you can follow these steps:

Step 1: Convert mixed numbers to improper fractions. Step 2: Subtract the fractions. Step 3: If necessary, simplify the result back to a mixed number.

Let's apply these steps to your expression:

1. Convert mixed numbers to improper fractions: 3 7/15 = (15 * 3 + 7)/15 = (45 + 7)/15 = 52/15

   4 - (-2 1/4) = 4 + 2 1/4 = 4 + 9/4

2. Subtract the fractions: (52/15) - (9/4)

To subtract fractions, you need to have a common denominator, which in this case is 60. So, let's rewrite both fractions with a common denominator of 60:

(52/15) * (4/4) = 208/60 (9/4) * (15/15) = 135/60

Now, subtract the fractions:

(208/60) - (135/60) = (208 - 135) / 60 = 73/60

3. Simplify the result back to a mixed number if needed:

To simplify 73/60 to a mixed number, divide the numerator (73) by the denominator (60):

73 ÷ 60 = 1 with a remainder of 13

So, the mixed number is 1 13/60.

Therefore, the expression 3 7/15 - 4 - (-2 1/4) is equal to 1 13/60.