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2+3= 5
5+8= 13
3+9= 12
5+7= 12
59+2= 61
12+18= 30
256+26+45 = 327
55+4 = 59
56+2= 58
2+8 = 10
1+1 = 2
10+4 = 14
k mik nha làm ơn
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
1 + 1 = 2
2 + 2 = 4
6 + 6 = 12
9 + 9 = 18
10 + 10 = 20
9 x 143 = 1287
90 : 45 = 2
9 - 8 - 1 = 0
5 + 5 - 9 = 1
9 - 5 - 2 = 2
3 + 4 - 4 = 3
1 + 1 + 2 = 4
9 - 5 + 1 = 5
8 + 1 -3 = 6
4 + 4 - 1 = 7
8 - 1 + 1= 8
2 + 2 + 5 = 9
5 + 4 + 1 = 10
9-8-1=0
5+5-9=1
9-5-2=2
3+4-4=3
1+1+2=4
9-5+1=5
8+1-3=6
4+4-1=7
8-1+1=8
2+2+5=9
5+4+1=10
1+1=2 4+5=9 6+5=11 7+8=15 10+9=19
12+9=21 45+9=54 31-8=23 45-9 =36 63+10=73
13+4=17 47-5=42 28-9=19 31-7=24 48+9=57
bn off mãi mãi à ?
a )
\(x+\frac{12}{15}=\frac{7}{5}\)
\(\Rightarrow x=\frac{7}{5}-\frac{12}{15}\)
\(\Rightarrow x=\frac{7}{5}-\frac{4}{5}\)
\(\Rightarrow x=\frac{3}{5}\)
Vậy \(x=\frac{3}{5}\)
b )
\(x-\frac{6}{8}=\frac{3}{15}\)
\(\Rightarrow x-\frac{3}{4}=\frac{1}{5}\)
\(\Rightarrow x=\frac{1}{5}+\frac{3}{4}\)
\(\Rightarrow x=\frac{4}{20}+\frac{15}{20}\)
\(\Rightarrow x=\frac{19}{20}\)
Vậy \(x=\frac{19}{20}\)
~ Ủng hộ nhé
\(x+\frac{12}{15}=\frac{7}{5}\)
\(\Rightarrow x=\frac{7}{5}-\frac{12}{15}\)
\(\Rightarrow x=\frac{7}{5}-\frac{4}{5}\)
\(\Rightarrow x=\frac{3}{5}\)
1 + 1 = 2
5 + 9 = 14
45 + 2 = 47
1+1=2
5+9=14
45+2=47