Tính nhanh :
a) 64 * 50 + 44 * 100 / 27 * 38 + 146 * 19
b) ( 456 * 11 + 912 ) * 37 / 13 * 74
Tính nhanh: 64 nhân 50 cộng 44 nhân 100/ 27 nhân 38 cộng 146 nhân 19
\(\frac{64X50+44X100}{27X38+146X19}=\frac{64X50+44X2X50}{27X2X38+146X19}=\frac{64X50+88X100}{54X38+146X19}=\frac{50X\left(64+88\right)}{19X\left(54+146\right)}=\frac{50X152}{19X200}\)\(=\frac{̸5̸̸0X152}{19X4X̸5̸0}=\frac{152}{76}=2\) Đáp số :2
A = ( 100 * 44 + 50 * 64 ) * ( 37414,8 : 1000 + 2242,52 : 100 )
B = ( 16 * 14,96 * 25 ) * ( 27 * 38 + 19 * 146 )
Hãy tính A : B
Cho A = (100·44 + 50·60)·(37414,81000 + 2242,52100)
B = (16·14,96·25)·(27·38 + 19·146)
A = (100·44 + 50·2·30)·(3741,48·1100 + 2242,52·1100)
A = 100.(44 + 30).(3741,48 + 2242,52)·1100
A = 7400·5984·1100 A = 74·5984
B = (16·14,96·25)·(27·38 + 19·146)
B = (4·4·14,96·25)·(27·2·19 + 19·146)
B = 100·4·14,96 + 19.(146 + 54)
B = 1496·4 + 19·200
B=5984*19*200
==>AB=5984*745984*19*200
AB=7419*200
AB=3719*100(giảm hai vế đi hai lần)
=>A;B=37/1900
chúc bn học tốt
tính nhanh: 64 x 50 + 44 x 100 phần 27 x 38 + 146 x 19 .
64x100+50x44
=2200+6400
=8600
1026+2774
=3800
mình làm đúng ko vậy
TL:
= 3800
nhé
K CHO MK NHAAAAAAA
BNNNNNNNNNNNNNNNNNNNNNNNNNN
~~HT~~
TL:
64x100+50x44
=2200+6400
=8600
1026+2774
=3800
HT
Tính nhanh 64*50 +44*100gach ngang 27*38+146*19
tính nhanh: 64 x 50 + 44 x 100
__________________
27 x 38 + 146 x 19
a. 64 x 50 + 44 x 100
= 32 x 2 x 50 + 44 x 100
= 32 x 100 + 44 x 100
= (32 + 44) x 100
= 76 x 100
= 7600
b. 27 x 38 + 146 x 19
= 27 x 38 + 73 x 19 x 2
= 27 x 38 + 73 x 38
= (27 + 73) x 38
= 100 x 38
= 3800
a/b = 7600/3800 = 2
\(64\times50+44\times100\)
\(=32\times2\times50+44\times100\)
\(=\left(32+44\right)\times100\)
\(=76\times100=7600\)
64x50+44x100
=32x2x50+44x100
=32x(50x2)+44x100
=32x100+44x100
=(32+44)x100
=76x100
=7600
cho A= ( 100 x 44 + 50 x 64 ) x ( 37414,8 : 1000 +2242,52 : 100 )
và B= ( 16 x 14,96 x 25 ) x ( 27 x 38 + 19 x 146 ). Tính A : B
Đố vui
(64×50+44×100) : (27×38+146×19)
=(32x100+44x100) : (27x38+73x38)=\(\frac{100x\left(32+44\right)}{\left(27+73\right)x38}=\frac{100x76}{100x38}=2\)
1. thực hiện phép tính :
a/ 27 . 332 + 93 . 43 + 57 . 61 + 69 . 57
b/ 34 . 75 + 75 . 66 - 65 . 100
c/ ( 456 . 11 + 912 ) . 37 : 13 : 74
d/ 62 : 4 . 3 + 2 . 52
e / 5 . 42 - 18 : 32
g/ [ ( 315 + 372 ) . 3 + ( 372 + 315 ) . 7 ] : ( 26 . 13 + 74 .14 )
h/ 12 : { 390 : [ 500 - ( 125 + 35 . 7 ) ] }
k / 192000 - ( 1500 . 2 + 1800 . 3 + 1800 .2 : 3 )
\(27.332+93.43+57.61+69.57\\ =27.332+93.43+57.\left(61+69\right)\\ =27.332+93.43+57.130\\ =8964+3999+7410=20373\\ 34.75+75.66-65.100\\ =\left(34+66\right).75-65.100\\ =100.75-65.100\\ =100.\left(75-65\right)\\ =100.10=1000\\ \left(456.11+912\right).37:13:74\\ =5928:13:\left(74:37\right)\\ =456:2=228\\ 6^2:4.3+2.5^2\\ =36:4.3+2.25\\ =9.3+50=27+50=77\\ 5.4^2-18:3^2\\ =5.16-18:9\\ =80-2=78\\\left[\left(315+372\right).3+\left(372+315\right).7\right]:\left(26.13+74.14\right)\\ =687.\left(3+7\right):\left(338+1036\right)\\ 687.10:1374\\ =6870:1374=5\\ 12:\left\{390:\left[500-\left(125+35.7\right)\right]\right\}\\ =12:\left[390:\left(500-370\right)\right]\\ =12:\left(390:130\right)=12:3=4\\ 192000-\left(1500.2+1800.3+1800.2:3\right)\\ =192000-\left(3000+5400+1200\right)\\ =192000-9600=182400\)
b, \(\frac{64\text{ x }50+44\text{ x }100}{27\text{ x }38+146\text{ x }19}\)
TÍNH NHANH
Ai đúng thì tick
\(\frac{64\cdot50+44\cdot100}{27\cdot38+146\cdot19}\)
\(\frac{32\cdot100+44\cdot100}{27\cdot38+73\cdot38}\)
\(\frac{\left(32+44\right)\cdot100}{\left(27+73\right)\cdot38}\)
\(\frac{56\cdot100}{100.38}\)
\(\frac{56}{38}\)
\(\frac{28}{19}\)
k mình nha