tinh nhanh
-125.(1+235) . (-25) +125 . (-100)
Tinh nhanh:125+125+125+125-25-25-25-25
125 + 125 + 125 + 125 - 25 - 25 - 25 - 25
= ( 125 - 25 ) + ( 125 - 25 ) + ( 125 - 25 ) + ( 125 - 25 )
= 100 + 100 + 100 + 100
= 100 x 4
= 400
Câu 10. (1 điểm) Tính nhanh
(125 x 0,75 + 125 x 25%) x ( 9 x 11 – 0,9 x 100 – 0,9 x 10)
HELP!!!!
= ( 125 x 0,75 + 125 x 25% ) x ( 9 x 11 - 0,9 x 100 - 0,9 x10 )
= ( 125 x 0,75 + 125 x 0,25 ) x ( 9 x 11 - 9 x 10 - 9 x 1 )
= 125 x ( 0,75 + 0,25 ) x ( 9 x 11 - 9 x 10 - 9 x 1 )
= 125 x 9 x ( 11-10 -1 )
= 125 x 9 x 0
= 0
Bai 1 Tinh nhanh
25.(6-125)+125.(25-6)
Bai 2 Tim so nguyen n sao cho
a)13⋮(n+1)
b)(4n+3)⋮(n-2)
tinh nhanh
C = 1+1/5+1/25+1/125+1/625+1/3125
125 + 125 + 124 +124 -235 =
123465 × 2356 =
Nhanh len dang can ai nhanh tick cho
125 + 125 + 124 + 124 - 235
= ( 125 x 2 ) + ( 124 x 2 ) - 235
= 250 + 248 - 235
= 498 - 235
= 263
125+125+124+124+235=263
123456x2356=121100
=250+248-235
=498-235
=263
290883540
tinh nhanh
4 x 125 x 25 x 8
2 x 8 x 50 x25 x125
2 x 3 x 4 x 5 x 50 x 25
25 x 20 x 125 x 8 - 8 x 20 x 5 x 125
4 × 125 × 25 × 8
= (4 × 25) × (125 × 8)
= 100 × 1000
= 100 000
2 × 8 × 50 × 25 × 125
= (2 × 50) × (8 × 125) × 25
= 100 × 1000 × 125
= 12 500 000
2 × 3 × 4 × 5 × 50 × 25
= (2 × 50) × (4 × 25) × (3 × 5)
= 100 × 100 × 15
= 150 000
25 × 20 × 125 × 8 - 8 × 20 × 5 × 125
= 8 × 125 × 20 × (25 - 5)
= 1000 × 20 × 20
= 400 000
- (25 x 4) x (125 x8)=100 x 1000 =100000
- (50 x 2) x (8 x 125) x 25=100 x 1000 x 25 =2500000
- (2 x 50 ) x (4 x 25) x (3 x5)=100 x 100 x 15=150000
- 25 x 20 x125 x 8 - 5
= (20 x 5) x (125 x 8) -25=100 x 1000 -5 =100000 - 5 =99995
4 *125*25*8
=4*25*125*8
=100*1000
=100000
2*8*50*25*125
=2*50*8*125*25
=100*1000*25
=2500000
2*3*4*5*50*25
=2*50*4*25*3*5
=100*100*15
=150000
25*20*125*8-8*20*5*125
=25*4*5*125*8-8*125*20*5
=100*1000*5-1000*100
=500000-100000
=400000
=
tinh nhanh :
a) (-4).(+125).(-25).(-6).(-8)
b)(-98).(1-246)-246.89
Nhớ cái này mà tính:
4*25=100
8*125=1000
Mày cứ nhớ công thức này rồi tự tính
4*25=100
8*125=1000
con bai b lam sao pha ngoac day
125+75+65+25+15
tinh nhanh
125+75+65+25+15
=[125+75]+[65+25]+15
=200+90+15
=290+15
=305
ai k mk mk k lai
=305 nha bạn nhớ tk mình và kb nha