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a) 30 + 192 + 70 = 30 + 70 + 192
= 100 + 192 = 292
b) 50 + 794 + 50 = 50 + 50 + 794
= 100 + 794 = 894
c) 75 + 219 + 25 = 75 + 25 + 219
= 100 + 219 = 319
d) 725 + 199 + 125 = 725 + 125 + 199
= 850 + 199 = 1 049
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19/20x2/100+19/20x2/100
= [19/20+19/20]x2/100
= 38/20x2/100
= 19/500
75/76x102/100-75/76x2/100
= [102/100-2/100]x75/76
= 1x75/76
= 75/76
3x7/10+7/10x5+2x7/10
= [3+5+2]x7/10
= 10x7/10
= 7
giá trị biểu thức
2/5+2/3x3/4
= 2/5+1/6
= 17/30
1/2x1/3-1/8
= 1/6-1/8
= 1/24
[1/2+1/3]:3/9
= 5/6:3/9
= 5/2
nhớ tick cho tớ nhé
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`@` `\text {Ans}`
`\downarrow`
`471 + 43 + 29 + 57`
`= (471 + 29) + (43+57)`
`= 500 + 100`
`= 600`
471+43+29+57
= (471+29)+(43+57)
=500+100
=600
Chúc bn hok tốt!!!
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25 x 9 x 4 x 100:1000=
[25 x 4] x [9 x 100]:1000=
100 x 900 : 1000=
90000 : 1000=
90
100 */ 70 + 100 * 30 + 100 * 0
= 100 * ( 70 + 30 + 0 )
= 10000
****n nhe
100 x 70 + 100 x 30 x 100 x 0
= 100 x ( 70 + 30 + 0 )
= 100 x 100
= 10000