1.2+2.9+3.7+7.7=?
Những câu hỏi liên quan
a) 6.3+(-3.7)+2.4+(-0.3)
b)(-4.9)+5.5+4.9+(-5.5)
c)2.9 +3.7+(-4.2)+(-2.9)+4.2
d)(-6.5).2.8+2.8.(-3.5)
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a) 6.3+(-3.7)+2.4+(-0.3)
b)(-4.9)+5.5+4.9+(-5.5)
c)2.9 +3.7+(-4.2)+(-2.9)+4.2
d)(-6.5).2.8+2.8.(-3.5)
a) 6,3 + (-3,7) + 2,4 + (-0,3)
= (6,3 + 2,4) + [-3,7 + (-0,3)]
= 8,7 + (-4)
= 4,7
b) (-4,9) + 5,5 + 4,9 + (-5,5)
= (-4,9 + 4,9) + [5,5 + (-5,5)]
= 0 + 0
= 0
c) 2,9 + 3,7 + (-4,2) + (-2,9) + 4,2
= [2,9 + (-2,9)] + (-4,2 + 4,2) + 3,7
= 0 + 0 + 3,7
= 3,7
d) (-6,5) . 2,8 + 2,8 . (-3,5)
= 2,8 . [-6,5 + (-3,5)]
= 2,8 . (-10)
= -28.
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Cho A=7.7^2.7^3.7^4. ... .7^29
Tìm số dư của A khi chia cho 8
cíu mình zới
nhầm, nhân thành cộng nhé mn
sau khi them vao so tru 3.7 va bot o so bi tru 2.9 thi hieu hai so la 15.4. Tim hieu ban dau
hiệu ban đầu là: 15.4-(2.9+3.7)=8.8
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đúng đấy nhé tớ đã được cô giáo chữa cho rồi đó
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nếu thêm vào số bé 3.7 và bớt số lớn 2.9 thì hiệu mới là 15.4 .tìm hiệu cũ của hai số đó.(có vẽ hình)
Hiệu cũ của 2 số đó là :
15,4 + 3,7 + 2,9 = 22
Đáp số :22
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hiệu cũ là:
15,4+ 3,7+2,9=22
đáp số :22
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Hiệu cũ của số đó là:
15,4 + 3,7 + 2,9 = 22
Đáp số : 22
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Xem thêm câu trả lời
Tìm x biết: x + 1/1.2 + 1/2.4 + 1/3.7+1/7.11+1/11.16=1
x = \(\frac{163}{528}\)
cho 1 đ-ú-n-g nha bạn
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1.Tính tổng: A = 1.2 + 3.4 +...+ 2(2n+1)(n+1)
2.Tính tổng: A = 1.3 + 3.7 + 5.11 +...+ 99.199
Do:Có những cặp phân số mà khi ta nhận chúng với nhau hoặc công chúng với nhau đều được cùng một kết quả.Chẳng hạn:Cặp phân số 7/3 va 7/4 co:7/3.7/4=7.7/3.4=49/12 7/3+7/4=7.4+7.3/12=49/12
Tìm x,biết x là số tự nhiên và (1.2+3.7)<x<(2.1+3.2)
