(72+28) × 900
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\(\left(-48\right).54+\left(-48\right).46+480\)
\(=\left(-48\right).\left(54+46\right)+480\)
\(=\left(-48\right).100+480\)
\(=-4800+480\)
\(=-4320\)
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\(900:\left[50+\left(7^2-8.3\right).2\right]+2022^0\)
\(=900:\left[50+\left(49-24\right).2\right]+1\)
\(=900:\left[50+25.2\right]+1\)
\(=900:\left[50+50\right]+1\)
\(=900:100+1\)
\(=9+1=10\)
= 72 . 28 -72. 49 + 28. (-49)-28.72
= 72.28 - 28 . 72 - 72 . 49 + 28 . (-49)
= 0 - 72 . 49 + 28 . ( -49 )
= -72 .49 + 28 . ( -49)
= 72 . ( -49) + 28 . (-49)
= (72+28) .(-49)
= 100 . (-49)
= -4900
k mình nha !
\(900\times28:9\\ =\left(900:9\right)\times28\\ =100\times28\\ =2800\)
28 x 47 + 28 x 43 + 72 x 29 + 72 x 61
= 28 x ( 47 + 43 ) + 72 x ( 29 + 61)
= 28 x 90 + 72 x 90
= 90 x ( 28 + 72)
= 90 x 100
= 9 000
k mk nha
28 x 47 + 28 x 43 + 72 x 29 + 72 x 61
= 28 x (47 + 43) + 72 x (29 + 61)
= 28 x 90 + 72 x 90
= (28 + 72) x 90
= 100 x 90 = 9000
a) 20 x 40 = 800 70 x 60 = 4 200 400 x 20 = 8 000 900 x 30 = 27 000
b) 900 : 30 =30 240: 80 = 3 3 600 : 600 =6 28 000 : 400=70
a) 28/140=0.2 b) 2 23/75=2.3066
33/75=0.44 4 216/900=4.24
261/900=0.29 1 415/1250=1.332
415/1250=0.332 5 28/140=5.2
\(\left(72.72+72.28\right)+x:8\)
\(\left[72.\left(72+28\right)\right]+x:8\)
\(\left(72.100\right)+x:8\)
\(7200+x:8\)
\(x:8=-7200\)
\(x=-57600\)
vậy \(x=-57600\)
a. \(\frac{4}{25}\times72+\frac{4}{25}\times28=\frac{4}{25}\times\left(72+28\right)=\frac{4}{25}\times100=4\times4=16\)
b.\(0.5\times72+\frac{3}{6}\times28=0.5\times72+0.5\times28=0.5\times\left(72+28\right)=0.5\times100=50\)
a) 20 × 190 × 50 = (20 × 50) × 190 = 1000 × 190
= 190000
b) (900 × 28) ÷ 9 = (900 ÷ 9) × 28 = 100 × 28 = 2800
`(72+28)xx900=100 xx 900 = 90000`