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+1 lớn hon
chắc chắn là 2
gọi số học sinh của khối 6 là a
a = {430 ⇒ 460}⋮2;3;5
BC(2;3;5)={0,30,60,90,120,150,190,220,250,290,320,350,390,420,450,490,...}
theo đề bài, a nằm khoảng từ 430 ⇒ 460 học sinh
kết luận đáp án cuối cùng là: 450 học sinh khối lớp 6
a) 76.12 + 24.12 - 200
= 12.(76 + 24) - 200
= 12.100 - 200
= 1 200 - 200
= 1000
b) 34.36 + 43.81 - 100
= 81.36 + 64.81 - 100
= 81.(36+64) - 100
=81.100-100
= 8 100 - 100
= 8000
Số tiền anh Đô mua quần,áo và khăn là :
120 000.2 + 95 000.3 + 17 000.5
= 240 000 + (285 000 + 85 000)
= 240 000 + 370 000
= 610 000 (đồng)
Số tiền anh Đô phải trả sau khi dùng hai phiếu mua hàng là :
610 000 - 100 000.2 = 410 000(đồng)
Đáp số: 410 000 đồng
a) 8=VIII
15=XV
24=XXIV
b) B(3<10)={0,3,6,9}