65 + 54 - 45 x 7356652245 x 0 +456 = ?
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a) 54 + x - 65 + 3 = 12
54 + x - 65 = 9
54 + x = 74
x = 74 - 54
x = 20
b) x - 45 + 65 = 59
x - 45 = -6
x = -6 + 45
x = 39
\(a,54+x-65+3=12\)
\(\Leftrightarrow54+x-\left(65-3\right)=12\)
\(\Leftrightarrow54+x-62=12\)
\(\Leftrightarrow54-x=12+62\)
\(\Leftrightarrow54-x=74\)
\(\Leftrightarrow x=54-74\)
\(\Leftrightarrow x=-20\)
\(b,x-45+65=59\)
\(\Leftrightarrow x-\left(45-65\right)=59\)
\(\Leftrightarrow x-\left(-20\right)\)
\(\Leftrightarrow x+20=59\)
\(\Leftrightarrow x=59-20\)
\(\Leftrightarrow x=39\)
45+(-456) x 0 +123465789
=45+0+123465789
=45+123465789
=123465834
456 x 65 + 456 x 25 + 456 x 10
=456x(65+25+10)
=456x100
=45 600
1 + 1 = 2
5 x 3 = 15
7 x 4 = 28
65 + 45 = 110
9 x 54 = 486
1 + 1 = 2
5 x 3 = 15
7 x 4 = 28
65 + 45 = 110
9 x 54 = 486
a,456*65+456*34+456
=456*65+456*34+456*1
=456*(65+34+1)
=456*100
=45600
1. Tính:
a) 23 + 24 - ( 65 x 2 - 4 ) x 4 + 66 + 44 - ( 54 : 9 x 9 : 9 + 45 ) : 1 + 1 - 1 x ( 23 + 23 - 23 x 2 +1 ) = 51
b) 4444444444444444444444444444444444444444444444444444444444444444444 : 1
= 4444444444444444444444444444444444444444444444444444444444444444444
c) 30 = 0
d) 1/1 = 1
e)
a) - 530
b) 44444444444444444444444444444444444444444444444444444444444444444444
c) 0
d) 1
e) Em là em
65+54-45.7356652245.0+456
=65+54+456
=575
_ht_
65 + 54 - 45 x 7356652245 x 0 +456
=575