Question

1)6,965+23,3 2)88,000-9,804 3)16,94:2,8 4)5_6+1_4 (пять шестых + одна четвертая) 5)3_10-4_15 (три десятых - четыре пятнадцатых) 6)4_9x4_9 (четыре девятых умножить на четыре девятых) 7)Найти 25% от чисел: а)200 б)3 в)5,7

Answer 1

1) 30,265
2) 78.196
3) 6.05
4) 13/12
5) 1/30
6) 16/81
7) 200 - 100%
х - 25%
х=50
3 - 100%
х - 25%
х= 0,75
5,7 - 100%
х - 25%
х= 1,425

Answer 2

1)6,965+23,3=30,265
2)88,000-9,804= 78,196
3)16,94:2,8=6,05
4)5/6+1/4=1,083
5)3/10-4/15=1/3
6)4/9*4/9= 2,1/4
7)а =50
Б=0,75
В=1,425

Answer 3

Let's solve each of the given mathematical expressions step by step:

1. 6,965 + 23,3 = 6995 + 23.3 = 7023.3

2. 88,000 - 9,804 = 88000 - 9804 = 78196

3. 16,94 : 2,8 = 16.94 / 2.8 ≈ 6.050

4. 5/6 + 1/4 = (5/6) + (1/4) = (10/12) + (3/12) = 13/12 ≈ 1.0833

5. 3/10 - 4/15 = (9/30) - (8/30) = 1/30 ≈ 0.0333

6. 4/9 × 4/9 = (16/81) ≈ 0.1975

7. Find 25% of the numbers:

a) 25% of 200 = 0.25 × 200 = 50

b) 25% of 3 = 0.25 × 3 = 0.75

c) 25% of 5.7 = 0.25 × 5.7 = 1.425

So, the answers to the given expressions are:

1. 6,965 + 23,3 = 7023.3
2. 88,000 - 9,804 = 78196
3. 16,94 : 2,8 ≈ 6.050
4. 5/6 + 1/4 ≈ 1.0833
5. 3/10 - 4/15 ≈ 0.0333
6. 4/9 × 4/9 ≈ 0.1975
7. a) 50; b) 0.75; c) 1.425