Question

1.Viết tiếp vào chỗ trống:

1/2 của 60 là ....      1/3 của 60 là .....       1/5 của 60 là ......

1/6 của 60 là ....      1/10 của 60 là....       1/12 của 60 là .....

2.Tính:

a)1 và 5 / 7 x 3 / 4=

b)10 / 11 : 1 và 1 / 3 =

3.Tìm x :

8,75 x x + 1,25 x x =20

(8 tich nha)

Answer 1

1/2 của 60 là 30    1/3 của 60 là 20       1/5 của 60 là 12

1/6 của 60 là 10     1/10 của 60 là 6       1/12 của 60 là 5

Answer 2

1.

1/2 của 60 là 30        1/3 của 60 là 20       1/5 của 60 là 12

1/6 của 60 là 10        1/10 của 60 là 6       1/12 của 12 là 5

2.

\(a,1\frac{5}{7}\times\frac{3}{4}=\frac{9}{7}\)

\(b,\frac{10}{11}:1\frac{1}{3}=\frac{15}{22}\)

3,

8,75 * x + 1,25 * x = 20

x * ( 8,75 + 1,25 ) = 20

x * 10 = 20

x = 20 : 10

x = 2

~ Thiên Mã ~

Answer 3

#)Giải :

Câu 1 :

1/2 của 60 là 30       ;        1/3 của 60 là 20      ;        1/5 của 60 là 12

1/6 của 60 là 10       ;        1/10 của 60 là 6      ;        1/12 của 60 là 5

Câu 2 :

a)\(1\frac{5}{7}x\frac{3}{4}=\frac{9}{7}\)

b) \(\frac{10}{11}:1\frac{1}{3}=\frac{15}{22}\)

Câu 3 :

          8,75xx + 1,25xx = 20 

         (8,75 + 1,25)xx    = 20

                10xx            = 20

                   xx             = 20 : 10

                   xx             = 2

                   

Answer 4

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