A=300
B=700
C=6
D=12000
E=0
G=1200
H=1
N=240
M=1
P=1400
O=3600
A, 345 – 35 – 10=300
B, 735 + 243 – 135 – 143=735-135+243-143=600+100=700
C, 18 – 16 + 14 – 12 + 10 – 8=6
D, 125 x 12 + 12 x 874 + 12=12(125+874+1)=12 x 1000=12000
E, 456 x 45 + 456 x 10 – 456 x 55=456(45+10-55)=0
G, 1475+399-475-199=1475-475+399-199=1000+200=1200
H, (1+3+5+7+9+11+13+15) : (32 x 2)=64:64=1
N, (24 x 6 + 4 x 24) : (49 – 24 x 2)=240:1=240
M, (1+2+3+…..+98+99+100) : 5050=5050:5050=1
P, 25 x 14 x 4=25x4x14=100x14=1400
O, 2 x 36 x 50=2x50x36=100x36=3600
A=345-35-10
A=310-10
A=300
B=735+243-135-143
B=(735-135)+(243-143)
B=600+100
B=700
C=18-16+14-12+10-8
C=(18-16)+(14-12)+(10-8)
C=2+2+2
C=6
D=125x12+12x874+12
D=12x(125+874+1)
D=12x1000
D=12000
E=456x45+456x10-456x55
E=456x(45+10-55)
E=456x0
E=0
G=1475+399-475-199
G=(1475-475)+(399-199)
G=1000+200
G=1200
H=(1+3+5+7+9+11+13+15):(32x2)
H=64:64
H=1
N=(24x6+4x24):(49-24x2)
N=240:1
N=240
M=(1+2+3+...+98+99+100):5050
M=5050:5050
M=1
P=25x14x4
P=(25x4)x14
P=100x14
P=1400
O=2x36x50
O=(2x50)x36
O=100x36
O=3600
A. 345 - 35 - 10 B. 735 + 243 - 135 - 143 C. 18 - 16 + 14 - 12 + 10 -8 D. 125. 12+12 .874 + 12
= 310 - 10 = ( 735 - 135 ) + ( 243 - 143 ) = ( 18 - 8 ) - 10 + ( 16 + 14 ) - 12 = 125. 12 + 12. 874 + 12.1
= 300 = 600 + 100 = 10 - 10 + 20 -12 = 12. ( 125 + 874 + 1)
= 700 = 8 = 12. 1000 = 12000
E. 456. 45 + 456 .10 - 456 .55 G. 1475 + 399 - 475 - 199 H. ( 1+3+5+7+9+11+13+15 ) : ( 32.2)
= 456 . ( 45 + 10 - 55 ) = ( 1475 - 475 ) + ( 399 - 199 ) = ( 1+3+5+7+9+11+13+15 ) : 64
= 456. 0 = 0 = 1000 + 200 = 1200 = [(11+9) + (13+7) + (5+15) + ( 1+3)] :64
= [ 20 + 20 + 20 + 4 ] : 64
= 64 : 64 = 1
N. ( 24.6+4.24) : (49 - 24.2) P. 25.14.4 O. 2.36.50 M. ( 1+2+3+..+98+99+100) : 5050
= 24.6+4.24 : 49 - 24.2 = 25.4.14 = 2.50.36 Bg: Số số hạng của dãy số trên là: ( 100 - 1):1 +1= 100 (số)
= 24.6 + 4.24 : 49.1 + 24.2 = 100 .14 = 100.36 Tổng của dãy số ở trên là: (100+1).100:2 = 5050
= 24. [( 24 + 6 ) : ( 49 + 1) ] = 1400 = 3600 => 5050 : 5050 = 1
= 24. [ 30 : 50 ]
= 24. 0,6 = 14,4