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a) 2.125.2002.8.5 = (2.5).(8.125).2002 = 10.1000.2002 = 20020000
b) 36.42 + 2.17.18 + 9.41.6 = 36.42 + 36.17 + 54.41 = 36. (42 + 17) + 54.41 = 36. 59 + 54.41 = 18.2.59 + 18.3.41 = 18.118 + 18.123 = 18.(118 + 123) = 18.241 = 4338
c) 28.47 + 28.43 + 72.29 + 72.61 = 28.(47 + 43) + 72.(29 + 61) = 28.90 + 72.90 = 90.(28 + 72) = 90.100 = 9000
d) 26.54 + 52.73 = 26.54 + 2.26.73 = 26.(54 + 146) = 26.200 = 5200
a) 2.125.2002.8.5 = (2.5).(8.125).2002 = 10.1000.2002 = 20020000
b) 36.42 + 2.17.18 + 9.41.6 = 36.42 + 36.17 + 54.41 = 36. (42 + 17) + 54.41 = 36. 59 + 54.41 = 18.2.59 + 18.3.41 = 18.118 + 18.123 = 18.(118 + 123) = 18.241 = 4338
c) 28.47 + 28.43 + 72.29 + 72.61 = 28.(47 + 43) + 72.(29 + 61) = 28.90 + 72.90 = 90.(28 + 72) = 90.100 = 9000
d) 26.54 + 52.73 = 26.54 + 2.26.73 = 26.(54 + 146) = 26.200 = 5200
a) \(\left(-48\right)+10+\left(-22\right)+\left(-10\right)\)
\(=\left[\left(-48\right)+\left(-22\right)\right]+\left(-10+10\right)\)
\(=-70+0=-70\)
\(a.75^2-50.75+25^2\\ =75^2-2.25.75+25^2\\ =\left(75-25\right)^2=50^2=2500\)
\(b.103.97\\ =\left(100+3\right)\left(100-3\right)\\ =100^2-3^2\\ =9991\)
\(a,75^2-50.75+25^2\\ =75^2-2.75.25+25^2\\ =\left(75+25\right)^2=100^2=10000\\ b,103.97\\ =\left(100+3\right).\left(100-3\right)\\ =100^2-3^2=10000-9=9991\)
4996 + 2314 + 1003
= ( 4996 + 2314 ) + 1003
= 7310 + 1003
= 8313
A)2.125.2002.8.5=(125.8).(2.5).2002. C)28.47+28.43+72.29+72.61 D)26.54+52.73
=1000.10.2002=10000.2002=20020000 =28.(47+43)+72.(29+61) =26.27.2+52.73
B)36.42+2.17.18+9.41.6=36.42+(2.18).17+9.41.6 =28.90+72.90 =(26.2).27+52.73
= 36.42 +2.17.18+41 .54 =90.(28+72) =52.27+52.73
=(36+54).(42+18).(41+2+17)=90.60.60=324000 =90.100=9000 =52.(27+73)=52.100=5200
bo tay