3/2+7/6+13/12+21/20+31/30+43/42+57/56+73/72+91/90
B= 3/2-5/6+7/12-9/20+11/30-13/42+15/56-17/72
3/2 - 5/6+ 7/12- 9/20 +11/30-13/42 +15/56 - 17/72+ 19/90
3/2-5/6+7/12-9/20+11/30-13/42+15/56-17/72+19/90
3/6 x 8/12 x 15/20 x 24/30 x 35/42 x 48/56 x 63/72 x 80/90
Tính nhanh
tính nhanh:3/12+3/20+3/30+3/42+3/56+3/72+3/90+3/110
tính :\(\frac{3}{2}+\frac{7}{6}+\frac{13}{12}+\frac{21}{20}+\frac{31}{30}+\frac{43}{42}+\frac{57}{56}+\frac{73}{72}+\frac{91}{90}\)
TOÁN BÀI TẬP VỀ NHÀ LỚP VIP 28/6/2023
1.Tính giá trị biểu thức
a]2/5 x 25/29 3/5 x 25/29 b]5/2 x 3/7-3/14:6/7
c]15/4:5/12-6/5:11/15
2.Tính giá trị biểu thức
a]2/3+20/21 x 3/2 x 7/5 b]5/17 x 21/32 x 47/24 x 0
c]11/3 x 26/7-26/7 x 8/3
3.Tìm x
a]25/8:x=5/16 b]x+7/15=6/15 c]x:28/49=7/12
4.Tìm x
a]6 x x=5/8:3/4 b]x
tính nhanh:3/12+3/20+3/30+3/42+3/56+3/72+3/90+3/110