Giải

Lớp 3A có số học sinh giỏi bằng số phần học sinh của lớp là :

      35 : 7 = 5 ( phần )

            Đáp số : 5 phần         

mẹ có số tuổi là:5x5=25(tuổi)

bố có số tuổi là:25+2=27(tuổi)

đáp số :27tuổi

Đầu tiên bạn tính tuổi mẹ trước : 5 * 5 = 25 ( tuổi )

Sau đó bạn tính tuổi bố : 25 + 2 = 27 ( tuổi )

Ba tổ còn lại thu được số kg giấy vun là :

          3 x 9 = 27 ( kg )

Lớp 3A T

lớp 3A thu được số kg giấy vụn là :

           10 + ( 3 x 9 ) = 37 ( kg ) 

                       Đáp số : 37 kg

Mk bỏ câu dưới nhé !

13:4+12-3+24:4-9=3,25+12-3+6-9

                             =15,25-0

                             =15,25

đề bài là:  Có 6 gói kẹo số gói bánh nhiều hơn số gói kẹo là 24. hỏi số gói kẹo bằng một phần mấy gói bánh?

     DÀNH CHO AI KHÔNG ĐỌC ĐƯỢC !!!!

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Học thuộc bảng nhân 9 là thuộc luôn bảng chia 9

Chúc may mắn!!!

số gà mái là

16+8=24 con gà

số gà trống bằng 8/24=1/3 số gà mái

một phần ba

200:y+400:y=2

(200+400):y=2

600:y=2

y=600:2

y=300 

Vậy y=300

Số gạo còn lại sau khi bán đi là:

683 - 53 = 630 (kg)

Số kg của từng bao gạo là :

630 : 7 = 91 (kg)

Đáp số : 91 kg