30+70-60×3=?ai nhanh minh tick cho
70+30=??????????????????
60+40=??????????????????
80+20=???????????????????
Ai NHANH MÌNH TICK CHO
70 + 30 = 100
60 + 40 = 100
80 + 20 = 100
k nha
BUI DOAN KHANH HUYEN
70 + 30 = 100
60 + 40 = 100
80 + 20 = 100
tất cả đều = 100
10 + 20 + 30 + 40 + 50 + 60 + 70 + 80 + 90 + 100 = ?
ai nhanh nhất mình tick cho.
10+20+30+40+50+60+70+80+90+100
=(10+100)+(20+90)+(30+80)+(40+70)+(50+60)
= 110+110+110+110+110
=110x5
=550
70 : 35 + 10 . 25 . + 60 . 30
ai nhanh mk tick
70 . 35 + 10 . 25 . + 60 . 30
= 2450 + 250 + 1800
= 4500
70 . 35 + 10 . 25 + 60 . 30
= 2450 + 250 + 1800
= 2700 + 1800
= 4500
k mình nhe. Học tốt
70 x 35 + 10 x 25 x 7 + 60 x 30
= 2450 + 1750 + 1800
= 4200 + 1800
= 6000
Học tốt!!!
95 - 53 =
70 + 28 =
60 - 40 + 30 =
Ai nhanh mình tick cho !
95 - 53 = 42
70 + 28 = 98
60 - 40 + 30 = 50
Mình nhanh nhất , tk mình nha !!!
tính nhanh
24 . 25 + 4 . 37 . 6 +24 . 38
70 35 + 10 . 25 . + 60 . 30
37 . 68 + 37 . 12 + 80 . 63
ai nhanh và đúng tick 3 tick
24 . 25 + ( 4 . 6 ) . 37 + 24 . 38
24 . 25 + 24 . 37 + 24 . 38
24 . ( 25 + 37 + 38 )
24 . 100
2400
24 . 25 + 4 . 37 . 6 +24 . 38
= 24 . 25 + 24 . 37 + 24 . 38
= 24 . ( 25 + 38 + 37 )
= 24 . 100 = 2400
100+30-[20+70]chia 2
ai nhanh minh tick
10+20+30+40+50+60+70+80+90+100=?
Tính nhanh nha!
Ai đúng đủ, trọn vẹn nhất thì mk tick!
\(10+20+30+40+50+60+70+80+90+100\)
\(=\left(10+90\right)+\left(20+80\right)+\left(30+70\right)+\left(40+60\right)+\left(50+100\right)\)
\(=100+100+100+100+150\)
\(=550\)
10 + 20 + 30 + 40 + 50 +60 + 70 + 80 + 90 +100
= (10+90) + (20 + 80 ) + ( 30 + 70 ) + ( 40 + 60 ) +100 + 50
= 100 + 100 + 100 + 100 +100 + 50
= 500 + 50
= 550
\(10+20+30+40+50+60+70+80+90+100\)
\(=\left(10+90\right)+\left(20+80\right)+\left(30+70\right)+\left(40+60\right)+50+100\)
\(=10+10+10+10+50+100\)
\(=10.4+50+100\)
\(=40+50+100\)
\(=90+100\)
\(=190\)
D=1/10+4/20+9/30+25/50+36/60+49/70+64/80+81/90
Ai nhanh nhat minh se tik vho nha
D=\(\frac{1}{10}+\frac{4}{20}+\frac{9}{30}+\frac{25}{50}+\frac{36}{60}+\frac{49}{70}+\frac{64}{80}+\frac{81}{90}\)
=> D=\(\frac{1}{10}+\frac{2}{10}+\frac{3}{10}+\frac{4}{10}+\frac{5}{10}+\frac{6}{10}+\frac{7}{10}+\frac{8}{10}+\frac{9}{10}\)
=> D = \(\frac{\left(1+9\right)+\left(2+8\right)+\left(3+7\right)+\left(4+6\right)+5}{10}\)
=> D =\(\frac{45}{10}=4,5\)
tính nhanh:
1+2+3+4+5+6+7+8+9
10+20+30+40+50+60+70+80+90
nhanh, đúng, đủ mới tick
1+2+3+4+5+6+7+8+9
=(1+9)+(2+8)+(3+7)+(4+6)+5
=10+10+10+10+5
=10.4+5
=45
10+20+30+40+50+60+70+80+90
=10.(1+2+3+4+5+6+7+8+9+)
=10.45
=450
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 ( có 9 số)
= (1 + 9) × 9 : 2
= 10 × 9 : 2
= 90 : 2
= 45
10 + 20 + 30 + 40 + 60 + 60 + 70 + 80 + 90
= 10 × (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9)
= 10 × 45
= 450