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Tổng số quyển vở một bạn nam và một bạn nữ mua được là:
5 + 4 = 9 quyển vở.
Số học sinh của lớp 3A là:
180 : 9 x 2 = 40 học sinh.
Đáp số: 40 học sinh.
Số vở của tất cả các bạn nam là : 180:9 =20
Số vở của cả lớp là :20+20=40
câu 1: 6295
câu 2: 5512
câu 3: 6170kg gạo
câu 4: 3996
câu 5: 27000 đồng
câu 6: 9
câu 7: 216 quả
câu 9: 8125
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Tổng só học sinh cả hai lớp 4A và 4B là:
27+33=60 (học sinh)
Mỗi học sinh mua số vở là:
720:60=12 (quyển vở)
Lớp 4A mua số vở là:
12x27=324 (quyển vở)
Lớp 4B mua được số quyển vở là:
12x33=396 (quyển vở)
Đáp số : lớp 4A : 324 (quyển vở)
lớp 4B : 396 (quyển vở)
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Bài giải : Mỗi bn đc mua số quyển vở là : 35 :7= 5 ( quyển vở )
=> Mỗi bn mua đc 5 quyển vở .
Số quyển vở khối lớp 3 trường tiểu học Hoàng Diệu quyên góp được là:
327 x 3 = 981 (quyển vở)
Đáp số: 981 quyển vở.
Olm chào em, đây là toán nâng cao chuyên đề toán tổng tỉ ẩn tỉ, cấu trúc thi chuyên, thi học sinh giỏi các cấp. Hôm nay, Olm sẽ hướng dẫn các em giải chi tiết dạng này như sau:
Giải:
Vì số bạn nam và số bạn nữ bằng nhau nên tỉ số số vở bạn nam mua và số vở bạn nữ mua là:
5 : 4
Theo bài ra ta có sơ đồ:
Theo sơ đồ ta có:
Số vở bạn nam mua là: 1242: (5 + 4) x 5 = 690 (quyển)
Số vở ban nữ mua là: 1242 - 690 = 552(quyển vở)
Số học sinh nữ là: 552 : 4 = 138(học sinh)
Số học sinh nam là: 690 : 5 = 138(học sinh)
Tổng số học sinh khối 3 là: 138 + 138 = 276(học sinh)
Đáp số: 276 học sinh