\(\dfrac{27}{37}\):\(\dfrac{9}{7}\)=\(\dfrac{21}{37}\)
` 27/37 : 9/7 = 27/37 . 7/9 = 189/333 = 21/37`
\(\dfrac{27}{37}\):\(\dfrac{9}{7}\)=\(\dfrac{27}{37}\)x\(\dfrac{7}{9}\)=\(\dfrac{21}{37}\)
\(\dfrac{27}{37}\):\(\dfrac{9}{7}\)=\(\dfrac{21}{37}\)
` 27/37 : 9/7 = 27/37 . 7/9 = 189/333 = 21/37`
\(\dfrac{27}{37}\):\(\dfrac{9}{7}\)=\(\dfrac{27}{37}\)x\(\dfrac{7}{9}\)=\(\dfrac{21}{37}\)
1+4+7+9+....+37 = ?
Help me !
So sánh a) A=7×9+14×27+21×36÷21×27+42×81+63×108 & N=37÷333
(-5/24+3/4=7/12):(-9/16)
97/30.12/37+12/30.23/27).13/31-(-25/37).18/31
1) 1/1×2 + 2/2×4 + 3/4×7 + 4/7×11 +...+ 8/29×37 + 9/37×46 + 10/46×56
2) 4/3×7 + 4/7×11 + 4/11×15 + 4/15×19 + 4/19×23 + 4/23×27
3) 4/3×6 + 4/6×9 + 4/9×12 + 4/12×15 + ... + 4/99×102
Tìm x biết
d) 32%-0,25:x=-17/5
e)(x+1/5)^2+17/25=26/25
f)-32/27-(3x-7/9)^3=-24/27
g)60%x+0,4x+x:3=2
h)|20/9-x|=1/12+1/20+1/30+1/42+1/56+1/72
i)8/5+(2/7+2/17+2/37/5/7+5/17+5/37).x=16/5
Lưu ý: câu i 2/7+2/17+2/37 phần(vế trên) 5/7+5/17+5/37(vế dưới)
tìm x biết
1) 9-25=(7-x)-(25+7)
2) (27-514) -(486-73)+x=7
3) 25+5+37-25+6-29-x=37
4) 14+(-12)+x =10-/-15/+ /-3/
Bài 1:
a) 5 + (-7) + 9 + (-11) +...+ 25 + (-27)
b) 34+35+36+37-24-25-26-27
c) (-100) + 112 + (-114) +...+ (-198) +200
CMR
a) 4ab = 5cd ( gạch ngang trên đầu )
CMR abcd chia hết cho 9
b) abc + deg chia hết cho 37
CMR abcdeg chia hết cho 37
c) abc - deg chia hết cho 7
CMR abcdeg chia hết cho 7
e) abc chia hết cho 27 . CMR bca chia hết cho 27
7 mũ 13 : 49 mũ 2
27 mũ 16 : 9 mũ 10
5 mũ 20 × 9 mũ 10
7 mũ 7 × 13+ 7 mũ 7 ×36
5 mũ 12 ×37-5 mũ 12×12
Mọi người giúp e nhanh với ạ