3-4 КЛАС !! ЗАДАНИЕ 31

ГОРОДОВОЙ

Пошаговое объяснение:

Д 11 1/4

2/5 : 8/25 + 2 1/7 * 14/3 = 11 1/4

1) 2/5 : 8/25 = 2/5 * 25/8 = 5/4 = 1 1/4 = 1,25

2) 2 1/7 * 14/3 = 15/7 * 14/3 = 10

3) 1,25 + 10 = 11,25 = 11 1/4

O -2 5/12

2 3/4 - 1 1/9 : 5/27 + 5/6 = -2 5/12

1) 1 1/9 : 5/27 = 10/9 : 5/27 = 10/9 * 27/5 = 6

2) 2 3/4 - 6 = 2,75 - 6 = -3,25 = -3 1/4

3) -3 1/4 + 5/6 = -3 6/24 + 20/24 = -2 30/24 + 20/24 = -2 10/24 = -2 5/12

Й 2 1/60

4/15 + 2 7/12 - 30/128 : 9/32 = 2 1/60

1) 30/128 : 9/32 = 30/128 * 32/9 = 5/6

2) 4/15 + 2 7/12 = 16/60 + 2 35/60 = 2 51/60

3) 2 51/60 - 5/6 = 2 51/60 - 50/60 = 2 1/60

O -2 5/6

3 1/2 : 4 2/3 - 4 2/3 + 1 1/12 = -2 5/6

1) 3 1/2 : 4 2/3 = 7/2 : 14/3 = 7/2 * 3/14 = 3/4

2) 3/4 - 4 2/3 = 9/12 - 4 8/12 = 9/12 - 3 20/12 = -3 11/12

3) -3 11/12 + 1 1/12 = -2 10/12 = -2 5/6

Г 1 31/72

4 5/12 - 3 13/24 + 1 1/9 * 1/2 = 1 31/72

1) 1 1/9 * 1/2 = 10/9 * 1/2 = 5/9

2) 4 5/12 - 3 13/24 = 4 10/24 - 3 13/24 = 3 34/24 - 3 13/24 = 21/24 = 7/8

3) 7/8 + 5/9 = 63/72 + 40/72 = 103/72 = 1 31/72

В 2 3/7

10 1/2 : 1 1/4 * 3/14 - 1 23/35 + 2 2/7 = 2 3/7

1) 10 1/2 : 1 1/4 = 21/2 : 5/4 = 21/2 * 4/5 = 42/5 = 8 2/5 = 8,4

2) 42/5 * 3/14 = 9/5 = 1 4/5 = 1,8

3) 9/5 - 1 23/35 = 63/35 - 1 23/35 = 63/35 - 58/35 = 5/35 = 1/7

4) 1/7 + 2 2/7 = 2 3/7

O 8/15

15 : 5/18 : 3 3/8 * 2 1/16 - 32 7/15 =

1) 15 : 5/18 = 15 * 18/5 = 3 * 18 = 54

2) 54 : 3 3/8 = 54 : 27/8 = 54 * 8/27 = 2 * 8 = 16

3) 16 * 2 1/16 = 16 * 33/16 = 33

4) 33 - 32 7/15 = 32 15/15 - 32 7/15 = 8/15

P 31/36

1/16 + 11/36 + 5/48 + 7/18 =

1) 1/16 + 5/48 = 3/48 + 5/48 = 8/48 = 1/6

2) 11/36 + 7/18 = 11/36 + 14/36 = 25/36

3) 25/36 + 1/6 = 25/36 + 6/36 = 31/36

O 1

(11 5/11 - 8 21/22) * 2/3 * 3/5 = 1

1) 11 5/11 - 8 21/22 = 11 10/22 - 8 21/22 = 10 32/22 - 8 21/22 = 2 11/22 = 2 1/2

2) 2 1/2 * 2/3 = 5/2 * 2/3 = 5/3

3) 5/3 * 3/5 = 1

возможно у вас опечатка в Г и неполное условие, заканчивается Й.

ответ: ГОРОДОВОЙ

1) 5-3+2=4 (1день)

2) 4-3+2=3 (2день)

3)3-3=0 (3день)

на третий день улитка каснется земли