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第62頁

信息發(fā)布者：
1600
3.7
0.4
??$6\frac 27$??
??$\frac {3}{4}$??
4
??$=\frac {1}{8}+\frac {1}{8}$??
??$=\frac {1}{4}$??
=3.7×(99+1)
=3.7×100
=370
??$=\frac {8}{3}-(\frac {7}{9}+\frac {2}{9})$??
??$=\frac {8}{3}-1$??
??$=\frac {5}{3}$??
=25×25
=625
=2.1×1.5÷6.3
=3.15÷6.3
=0.5
??$=\frac {9}{20}÷(\frac {1}{2}×\frac {6}{5})$??
??$=\frac {9}{20}÷\frac {3}{5}$??
??$=\frac {3}{4}$??
?$\begin {aligned}解：8.3x&=16.6\\x &=2\end {aligned}$?
?$\begin {aligned}解：\frac {1}{2}x&=\frac {1}{4}×\frac {1}{6}\\\frac {1}{2}x&=\frac {1}{24}\\x &=\frac {1}{12}\end {aligned}$?
989000000
9.89億
9
36
1:4=3:12
98
2
60
3
9
16
0.75
75
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