11 Составь программу действий и вычисли: a) 9.4: 6 + (18 + 22): 8 – 48 : (3 · 8 – 2 · 9) =[ 6) 5. (30 – 7.3) · (50 – 18): (28 : 7) + 81:9.7 = [
Ответы
Ответ:
Вычислить:
Сложение смешанных дробей с одинаковыми знаменателями:
а \frac{m}{c}
c
m
+ b \frac{n}{c}
c
n
= (а+b) + \frac{m+n}{c}
c
m+n
Вычитание:
а \frac{m}{c}
c
m
- b \frac{n}{c}
c
n
= (а-b) + \frac{m-n}{c}
c
m−n
1) 6 \frac{4}{9}
9
4
+ 3 \frac{5}{9}
9
5
= (6+3) + \frac{4+5}{9}
9
4+5
= 9 \frac{9}{9}
9
9
= 10
2) 10 \frac{11}{19}
19
11
+ 5 \frac{14}{19}
19
14
= (10+5) + \frac{11+14}{19}
19
11+14
= 15 \frac{25}{19}
19
25
= 16 \frac{6}{19}
19
6
3) 2 \frac{3}{13}
13
3
+ 2 \frac{11}{13}
13
11
= (2+2) + \frac{3+11}{13}
13
3+11
= 4 \frac{14}{13}
13
14
= 5 \frac{1}{13}
13
1
4) 1 \frac{5}{8}
8
5
+ 3 \frac{7}{8}
8
7
= (1+3) + \frac{5+7}{8}
8
5+7
= 4 \frac{12}{8}
8
12
= 4 \frac{3}{2}
2
3
= 5 \frac{1}{2}
2
1
5) 1- \frac{3}{11}
11
3
= \frac{11}{11}
11
11
- \frac{3}{11}
11
3
= \frac{11-3}{11}
11
11−3
= \frac{8}{11}
11
8
6) 1- \frac{13}{40}
40
13
= \frac{40}{40}
40
40
- \frac{13}{40}
40
13
= \frac{40-13}{40}
40
40−13
= \frac{27}{40}
40
27
7) 4 - 1 \frac{4}{7}
7
4
= 4 - \frac{11}{7}
7
11
= \frac{4*7}{7}
7
4∗7
- \frac{11}{7}
7
11
= \frac{28}{7}
7
28
- \frac{11}{7}
7
11
= \frac{28-11}{7}
7
28−11
= \frac{17}{7}
7
17
= 2 \frac{3}{7}
7
3
8) 10 - 9 \frac{3}{10}
10
3
= 10 - \frac{93}{10}
10
93
= \frac{10*10}{10}
10
10∗10
- \frac{93}{10}
10
93
= \frac{100}{10}
10
100
-
\frac{93}{10}
10
93
= \frac{100-93}{10}
10
100−93
= \frac{7}{10}
10
7
9) 5 \frac{2}{7}
7
2
- 2 \frac{5}{7}
7
5
= 4 \frac{9}{7}
7
9
- 2
\frac{5}{7}
7
5
= (4-2) + \frac{9-5}{7}
7
9−5
= 2 \frac{4}{7}
7
4
! (5 \frac{2}{7}
7
2
= 4 + 1 \frac{2}{7}
7
2
= 4 + \frac{9}{7}
7
9
= 4 \frac{9}{7}
7
9
)
10) 14 \frac{6}{20}
20
6
- 8 \frac{12}{20}
20
12
= 13 \frac{26}{20}
20
26
- 8 \frac{12}{20}
20
12
= (13-8) + \frac{26-12}{20}
20
26−12
= 5 \frac{14}{20}
20
14
= 5 \frac{7}{10}
10
7
11) 8 \frac{3}{14}
14
3
- 5 \frac{9}{14}
14
9
= 7 \frac{17}{14}
14
17
- 5 \frac{9}{14}
14
9
= (7-5) + \frac{17-9}{14}
14
17−9
= 2
\frac{8}{14}
14
8
= 2 \frac{4}{7}
7
4
12) 7 \frac{10}{21}
21
10
- 4 \frac{16}{21}
21
16
= 6 \frac{31}{21}
21
31
- 4 \frac{16}{21}
21
16
= (6-4) + \frac{31-16}{21}
21
31−16
= 2
\frac{15}{21}
21
15
= 2 \frac{5}{7}
7
5
13) 14 \frac{8}{31}
31
8
- 6 \frac{8}{31}
31
8
= (14-6) + \frac{8-8}{31}
31
8−8
= 8
14) (12 \frac{5}{22}
22
5
+ 7 \frac{17}{22}
22
17
) - (13 \frac{7}{23}
23
7
- 9 \frac{15}{23}
23
15
) = 16 \frac{8}{23}
23
8
1. 12 \frac{5}{22}
22
5
+ 7 \frac{17}{22}
22
17
= (12+7) + \frac{5+17}{22}
22
5+17
= 19 \frac{22}{22}
22
22
= 20
2. 13 \frac{7}{23}
23
7
- 9 \frac{15}{23}
23
15
= 12 \frac{30}{23}
23
30
- 9 \frac{15}{23}
23
15
= (12-9) + \frac{30-15}{23}
23
30−15
= 3 \frac{15}{23}
23
15
3. 20 - 3 \frac{15}{23}
23
15
= 19 \frac{23}{23}
23
23
- 3 \frac{15}{23}
23
15
= (19-3) + \frac{23-15}{23}
23
23−15
= 16 \frac{8}{23}
23
8
Ответ:А) 9 * 4 + (18 + 22) : 8 - 48 : (3 * 8 - 2 * 9) = 33
1) 18 + 22 = 40;
2) 3 * 8 = 24;
3) 2 * 9 = 18;
4) 24 - 18 = 6;
5) 9 * 4 = 36;
6) 40 : 8 = 5;
7) 48 : 6 = 8;
8) 36 + 5 = 41;
9) 41 - 8 = 33
Б) 5 * (30 - 7 * 3) * (50 - 18) : (28 : 7) + 81 : 9 * 7 = 423
1) 7 * 3 = 21;
2) 30 - 21 = 9;
3) 5 * 9 = 45;
4) 50 - 18 = 32;
5) 45 * 32 = 1440;
6) 28 : 7 = 4;
7) 1440 : 4 = 360;
8) 81 : 9 = 9;
9) 9 * 7 = 63;
10) 360 + 63 = 423
Всегда рад помочь. Поставь пожалуйста 5.
Пошаговое объяснение: