Question

1)7.3 - 0.05 : 0.2 =? 2) -21+42 : (-7) =? 3) (11/9 - 7/8)* 24/25 =? 4) 1целая 3/4 * 4/7 + 1целая 3/4 * 3/7 - 6 целых : (5/6 -2/3)=?

Answer 1

Ответ:

Пошаговое объяснение:

Answer 2

1) 7.3-0.05:0.2=7.3-0.25=7.05

2)-21+42:(-7)=-21+(-6)=-21-6=-27

3)(11/9-7/8)•24/25=25/72*24/25=1/3

4) =1+3/4-36=-34целая 1/4= -34.25

Answer 3

Let's solve each of the expressions one by one:

1. 7.3 - 0.05 ÷ 0.2

First, we perform the division: 0.05 ÷ 0.2 = 0.25

Now we substitute the result back into the expression: 7.3 - 0.25

Finally, we subtract: 7.3 - 0.25 = 7.05

Therefore, the answer is 7.05.

2. -21 + 42 ÷ (-7)

First, we perform the division: 42 ÷ (-7) = -6

Now we substitute the result back into the expression: -21 + (-6)

Finally, we add: -21 + (-6) = -27

Therefore, the answer is -27.

3. (11/9 - 7/8) × 24/25

To solve this expression, we need to find a common denominator for the fractions.

The common denominator for 9 and 8 is 72.

Rewriting the expression with the common denominator, we get: (88/72 - 63/72) × 24/25

Now we can subtract the fractions in the parentheses: (88/72 - 63/72) = 25/72

Substituting the result back into the expression: (25/72) × 24/25

Now we can cancel out the common factors: (1/72) × 24/1

Multiplying the numerators and denominators: 24/72

Simplifying the fraction: 1/3

Therefore, the answer is 1/3.

4. 1¾ × 4/7 + 1¾ × 3/7 - 6 ÷ (5/6 - 2/3)

Let's convert the mixed numbers into improper fractions:

1¾ = 7/4

Now we can rewrite the expression: (7/4) × 4/7 + (7/4) × 3/7 - 6 ÷ (5/6 - 2/3)

Simplifying the fractions: (7/4) × 4/7 + (7/4) × 3/7 - 6 ÷ (1/6)

Multiplying the numerators and denominators: (28/28) + (21/28) - 6 ÷ (1/6)

Simplifying further: 1 + 0.75 - 6 × 6

Calculating: 1 + 0.75 - 36

Adding and subtracting: 1.75 - 36

Calculating: -34.25

Therefore, the answer is -34.25.