a. 573+67-(573-23)
b. (- 73)-[23.5-6].2
(trả lời nhanh giúp em với ạ
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`30 000-15 273-4727`
`= 30 000-(15 273+4727)`
`=30 000-20000`
`=10 000`
`49 573-(25 000+9573)`
`=49 573-25 000-9573`
`=(49 573-9573)-25 000`
`=40000-25000`
`=15000`
Giải
a) x + 49 = 573
x = 573 - 49
x = 524
b) 94 - x = 48
x = 94 - 48
x = 46
Mình đầu tiên, yeah.
a) 8.427.3 + 6.573.4
= 8.3.427 + 6.4.573
= 24.427 + 24.573
= 24.(427 + 573)
= 24.1000
= 24000
b) 6.1235.20 - 5.235.24
= 6.20.1235 - 5.24.235
= 120.1235 - 120.235
= 120.(1235 - 235)
= 120.1000
= 120000
c) 3457 - 27.48 - 48.73 + 6543
= (3457 + 6543) - (27.48 + 48.73)
= 10000 - 48.(27 + 73)
= 10000 - 48.100
= 10000 - 4800
= 5200
Ủng hộ mk nha ^_-
a) \(-215+\left(-427\right)-\left(-515\right)-573\)
\(=-215+\left(-427\right)+515-573\)
\(=\left(-215+515\right)+\left(-427-573\right)\)
\(=-300+-1000=-1300\)
b) \(-68+68.\left(-76\right)+68.\left(-23\right)\)
\(=68.\left(-1\right)+68.\left(-76\right)+68.\left(-23\right)\)
\(=68.\left(-1+-76+-23\right)\)
\(=68.-10=-6800\)
a) 67+135+33
= ( 67+33)+135
= 100 + 135
= 235
b) 146+121+54+379
= ( 146+54)+( 121+379)
= 200 + 500
= 700
c) 198+232-98-32
= ( 232-32)+(198-98)
= 200 + 100
= 300
d)1+2+3+4+.........+50
= ( 50+1) x 50:2 =1275
e)2+4+6+8+..........+100
= ( 100+2) x 50 : 2 =2550
f) 23 x 56 +56
= 1288 + 56
= 1344
g)32 x 19+32
= 608 + 32
= 640
\(a.67+135+33\)
\(=\left(67+33\right)+135\)
\(=100+135=235\)
\(b.141+121+54+379\)
\(=\left(146+54\right)+\left(121+379\right)\)
\(=200+500=700\)
\(c.198+232-98-32\)
\(=\left(232-32\right)+\left(198-98\right)\)
\(=200+100=300\)
\(f.23.56+56=1288+56=1344\)
\(g.32.19+32=608+32=640\)
a)425-84-16=425-(84+16)=425-100=325.
b)821-73-27-21=(821-21)-(73+27)=800-100=700.
c)475-(75-36)=(475-75)+36=400+36=436.
d)573-(73-24)=(573-73)+24=500+24=524.
k nha có j kb vs mk
\(a,573+67-\left(573-23\right)\\ =573+67-573+23\\=\left(573-573\right)+\left(67+23\right)\\ =0+90\\ =90\\ b,\left(-73\right)-\left[2^3.5-6\right].2\\ =\left(-73\right)-\left[8.5-6\right].2\\ =\left(-73\right)-\left[40-6\right].2\\ =\left(-73\right)-34.2\\ =\left(-73\right)-68\\ =-141\)
\(573+67-\left(573-23\right)\)
\(=573+67-573+23\)
\(=\left(573-573\right)+\left(67+23\right)\)
\(=0+90=90\)
\(------------\)
\(\left(-73\right)-\left(2^3.5-6\right).2\)
\(=\left(-73\right)-\left(8.5-6\right).2\)
\(\left(-73\right)-34.2\)
\(=\left(-73\right)-68=-141\)