300

465 

a: 3

b: 52

c: 29

d: 7

e: 33

g: 32

h: 46

i : 801

9:x=3

x=9:3

x=3

vậy x=3

x+25=77

x=77-25

x=52

vậy x=52

67-x=38

x=67-38

x=29

vậy x=29

5×x=35

x=35:5

x=7

vậy x=7

66+x=41+58

66+x=99

x=99-66

x=33

vậy x=33

28+x=30×2

28+x=60

x=60-28

x=32

vậy x=32

54+x=50+50

54+x=100

x=100-54

x=46

vậy x=46

108+x=800+109

108+x=909

x=909-108

x=801

vậy x=801

1+6+7+9+3+5+67+78+23 +87+98+34+34

= 7 + 7+ 9 + 3 + 5 + 67 + 78 + 23 + 87+ 98 + 34 + 34

= 14 + 9 + 3 + 5 + 67 + 78 + 23 + 87+ 98 + 34 + 34

= 23 + 3 + 5 + 67 + 78 + 23 + 87+ 98 + 34 + 34

= 26 + 5 + 67 + 78 + 23 + 87+ 98 + 34 + 34

= 31 + 67 + 78 + 23 + 87+ 98 + 34 + 34

= 98 + 78 +  23 + 87+ 98 + 34 + 34

= 176 + 23 + 87+ 98 + 34 + 34

= 199 + 87+ 98 + 34 + 34

= 286 + 98 + 34 + 34

= 452

mình tính bằng 452

bạn k mình nha

là 177,8 nha bạn

    \(\left(57+58+59+60+61+62+63+64+65+66+67+68+69+70\right):5\)

\(=\left[\left(70+57\right).14:2\right]:5\)

\(=\left[127.14:2\right]:5\)

\(=1778:2:5\)

\(=889:5\)

\(=\frac{889}{5}\)

18 kg + 6 kg = 24 kg

24 kg – 5 kg  = 19 kg

10 kg + 3 kg – 5 kg = 13 kg – 5 kg = 8 kg

58 kg – 9 kg – 20 kg = 49 kg – 20 kg = 29 kg

a) x+3=11

    x=11-3=8

b) 58-x=54

        x=58-54=4

c) 67+3=x

   x=60 

a) 8

b) 4

c) 70

1.

5+6=11

3+9=12

2.

5-1=4

9-9=0

có sai đề không vậy

minh ko co sai de boi vi cai nay minh tu dat ra ma

ke

qua

bang

27

2 + 5 + 9 + 10 + 1

= 7 + 9 + 10 + 1

= 16 + 10 + 1

= 26 + 1

= 27

_________________

10 + 58 + 2

= 68 + 2

= 70

nha bn