\(C1:-7\frac{1}{3}+5\frac{3}{7}=\frac{-20}{3}+\frac{38}{7}\)
\(=\frac{-140}{21}+\frac{114}{21}=\frac{-26}{21}\)
\(C2:-7\frac{1}{3}+5\frac{3}{7}=\left(5-7\right)+\left(\frac{1}{3}+\frac{3}{7}\right)\)
\(=-2+\frac{16}{21}=\frac{-26}{21}\)
Vậy \(-7\frac{1}{3}+5\frac{3}{7}=\frac{-26}{21}\)
tinh bang 2 cach
hon so -3/1/3-5/2/11=
Bai 1 : Viet tap hop A cac so tu nhien lon hon 4 va ko vuot qua 7 bang hai cach .
a ) Viet tap hop cac so tu nhien khac 0 va ko vuot qua 12 bang hai cach .
b ) Viet tap hop M cac so tu nhien lon hon hoac bang 11 va ko vuot qua 20 bang hai cach .
c ) Viet tap hop M cac so tu nhien lon hon 9 ,nho hon hoac bang 15 bang 2 cach .
d ) Viet tap hop A cac so tu nhien ko vuot qua 30 bang 2 cach .
e ) Viet tap hop B cac so tu nhien lon hon 5 bang 2 cach .
f ) Viet tap hop C cac so tu nhien lon hon hoac bang 18 va ko vuot qua 100 bang 2 cach .
Ai lam nhanh minh se tick cho nha ,minh can gap .
Bai3:Tinh bang hai cach
Cach 1:Tinh gia tri so bi chia,so chia roi tinh gia tri ket qua.
Cach2:Chia hai luy thua cung co so.
a,3 mu 6 :3 mu 4
b,5 mu 7: 5 mu 5
c,3 mu 9: 3 mu 3
d,5 mu 5: 5
e,3 mu 2: 3 mu 0
Cach 1 : Tinh so bi chia, tinh so chia roi tinh thuong.
Cach 2:Chia hai luy thu cun co so roi tinh ket qua
a) 210:28 b) 46 : 43
c) 85 : 84 d) 74: 74
tinh bang cach hop li
a, 3/7+2/9+5/9+-9/10
b, 3/4+-1/7+14/7+-6/7+32/28
1. Cho A = { 1; 2; 3; 4; 5; 6; 7; 8; 9 }. Hay viet tap hop A bang cach chi ra tinh chat dac trung bang 3 cach
2. Tim 3 so tu nhien lien tiep sao cho tong 3 so do la 36
3. Viet tap hop A cac so tu nhien co 3 chu so sao cho tong cac chu so cua moi so la 5
giup minh nhe minh se tickcho ^^ thank you very much !!!
Tinh bang hai cach:
Cach 1:tinh so bi chia,tinh so chia roi tinh thuong
Cach 2:Chia hai luy thua cung co so roi tinh ket qua
a)36:34
b)57:55
tinh giup bang cach hay nhat 1/3-1/4+1/5-1/6+1/7
tinh tong cac phan so toi gian lon hon 3 nhung nho hon 4 co mau so bang 7 ket qua la..............
