Exercise 31: There were 10 birds on the branch, suddenly 6 birds flew away. How many birds are left on the branch?

Exercise 32: The red paper strip is 20cm long, the blue paper strip is 40cm long. How long are both paper strips in total?

Đáp án:

Giải thích các bước giải:

`31`. There are 4 birds left on the branch.

`->` `10 - 6 = 4`

`32`. Both paper strips together are 60 cm long.

`->` `20 + 40 = 60`

`@ taolanguoisiudepgai`

#Giải - Giải thik các bước giải

Exercise 31 :

    The remaining number of birds on the branch is:

                   10    -     6      =    4  ( bird )

                           Đ/S   :  4 bird

Exercise 32 :

    The total of both long strips of paper is :

                    20     +     40  = 60 ( cm )

                        Đ/S : 60 cm

                                           #nguyendinhbaophuc4g#