GDZ Reshebnik page 85 from a textbook in mathematics 2 class 2 part moro M.I. Free online Answers

GDZ page 85 from a textbook in mathematics 2 class 2 part moro M.I.

1. For the repair, there were 8 cans of paint, 2 kg each. How many kilograms of paint bought?
Make up and solve two tasks inverse this.

8 * 2 = 16 (kg) – paints bought.
Answer: 16 kg of paint.

Inverse problem 1.
Bought 6 kg of paint in 8 banks. How many paints in each bank?
16: 8 = 2 (kg) – paints in each bank.
Answer: 2 kg

Feedback 2.
Bought 16 kg of paint 2 kg in each bank. How many cans bought paint?
16: 2 = 8 (b.) – Paints bought.
Answer: 8 cans.

2. Zoya bought 2 albums, 6 p. For the album. How much did this purchase cost?
(Orally.) Make up and solve the task inverse this.

2 * 6 = 12 (p.) – Purchase cost.
Answer: 12 rubles.

Inverse problem 1.
Zoya bought 2 identical albums on 12 p. How much did each album cost?
12: 2 = 6 (r.) – It cost each album.
Answer: 6 rubles.

Feedback 2.
Zoya bought albums on 12 p. How many albums she bought if each album cost 6 p.?
12: 6 = 2 (album) – bought Zoya.
Answer: 2 albums.

3. Duck, chicken and geese it is necessary for a month 12 kg of grain. Gusey need 5 kg, and duck – 4 kg. How many kilograms of grain is needed for a month of chicken?

1) 5 + 4 = 9 (kg) – the grains are necessary goes and duck for a month.
2) 12 – 9 = 3 (kg) – grain is needed by a chicken.
Answer: 3 kg of grain.

4. 5 cm 3 mm o 60 mm;
8 dm 4 cm o 82 cm;
6 cm 9 mm o 69 mm;
3 dm 2 cm o 23 cm.

5 cm 3 mm <60 mm
(5 * 10) mm + 3 mm <60 mm
50 mm + 3 mm <60 mm
53 mm <60 mm

8 dm 4 cm> 82 cm
(8 * 10) cm + 4 cm> 82 cm
80 cm + 4 cm> 82 cm
84 cm> 82 cm

6 cm 9 mm = 69 mm
(6 * 10) mm + 9 mm = 69 mm
60 mm + 9 mm = 69 mm
69 mm = 69 mm

3 dm 2 cm> 23 cm
(3 * 10) cm + 2 cm> 23 cm
30 cm + 2 cm> 23 cm
32 cm> 23 cm

Multiplier 2 2 6 2 8 2
Multiplier 4 5 2 7 2 9
Production 8 10 12 14 16 18

6. 1) As far as the amount of numbers 42 and 19, what is their difference?
2) how much less than the amount of numbers 8 and 2 than their work?

1) (42 + 19) – (42 – 19) = 61 – 23 = 38 (units) – the amount of numbers 42 and 19 is greater than their difference.
Answer: By 38.

2) 8 * 2 – (8 + 2) = 16 – 10 = by 6 (units) – the amount of numbers 8 and 2 is less than their product.
Answer: by 6.

35 + 8 − 23 = 43 − 23 = 20
74 + 7 − 31 = 81 − 31 = 50
50 − (34 + 9) = 50 − 43 = 7
50 − 34 − 9 = 16 − 9 = 7
8 + 6 + 12 + 4 = (8 + 12) + (6 + 4) = 20 + 10 = 30
9 + 7 + 13 + 11 = (9 + 11) + (7 + 13) = 20 + 20 = 40

8. Perimeter of square 8 cm. Find the length of the side of this square.

8: 4 = 2 (cm) – the length of the sides of the square.
Answer: 2 cm.

9. Lay out the counting sticks such a figure.
With the help of 5 sticks, we divide this figure to 5 identical squares. Remove 1 wand to get 4 identical squares.