20+1+8+4+7+9
=21+8+4+7+9
=29+4+7+9
=33+7+8
=40+9
=40
20 + 1 + 8 + 4 + 7 + 9 = 49
k mình bạn nhé!
20 + 1 + 8 + 4 + 7 + 9 = 49 bình trọn mình nha cảm ơn
20 + 1 + 8 + 4 + 7 + 9
= 21 + 8 + 4 + 7 + 9
= 29 + 4 + 7 + 9
= 32 + 7 + 9
= 39 + 9
= 48
20+1+8+4+7+9
=21+8+4+7+9
=29+4+7+9
=33+7+8
=40+9
=40
20 + 1 + 8 + 4 + 7 + 9 = 49
k mình bạn nhé!
20 + 1 + 8 + 4 + 7 + 9 = 49 bình trọn mình nha cảm ơn
20 + 1 + 8 + 4 + 7 + 9
= 21 + 8 + 4 + 7 + 9
= 29 + 4 + 7 + 9
= 32 + 7 + 9
= 39 + 9
= 48
1+1+2+2+3+3+4+4+5+5+6+6+10+10+12+12+14+14+16+16+18+18+20+20+7+7+8+8+9+9
GIUP MK VOI MK TICK CHO NGUOI NHANH NHAT
x = 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 .
x = 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 .
x = 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 .
(140-20×7)÷(45+12+1+2+3+4+5+6+7+8+9+10)
20 x 1 + 20 x 2 + 20 x 3 + 20 x 4 + 20 x 5 + 20 x 6 + 20 x 7 + 20 x 8 + 20 x 9 + 20 x 10 =
tính 1+2-3+4-5+6-7+8-9+......+18-19+20
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20-1-5-9-3=
(2 điểm) Tính tổng
a. x = 1+ 2+ 3+ 4 + 5 + 6 + 7 + 8 + 9 +10
b. y = 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20
a .(18 – 9 x 2) x (2 + 4 + 6 + 8 + 10)
b.(7 x 8 – 56 ) : (2 + 4 + 6 + 8 + 112)
c. (2 + 125 + 6 + 145 + 112) x (42 – 6 x 7)
d.(12 x 6 – 12 x 4 – 12 x 2) x ( 347 + 125)
e(a x 7 + a x 8 – a x 15) : (1 + 2 + 3 + ........ + 10)
f.58 – 58 x (6 + 54 – 60)
g.32 + 63 x a x ( a x 1 – a : 1) + 32 x 8 + 32
h.(1 + 2 + 3 + 4 + .... + 9) x (21 x 5 – 21 – 4 x21)
i.(9 x 7 + 8 x 9 – 15 x 9) : (1 + 3 + 5 + 7 + ........+ 17 + 19)
k.(2 + 4 + 6 + 8 + ... + 20) x (56 x 3 – 72 : 9 x 21)
1x2x3x4x5x6x7x8x9x0+1+2+3+4+5+6+7+8+9=
giúp mk lên 20 đ nha