135 - 28 + 77 =
答案:
34 + 130 - 25 =
答案:
138 - (29 - 24) =
答案:
257 - 36 - 9 =
答案:
324 + 73 + 4 =
答案:
560 - (24 + 32) =
答案:
530 + 21 + 46 =
答案:
81 + 53 + 4 =
答案:
422 - 17 + 38 =
答案:
310 - 25 + 36 =
答案:
53 + (98 - 29) =
答案:
260 + 70 + 8 =
答案:
$\frac{1}{3} + \frac{1}{3} =$
答案:
$\frac{2}{5} + \frac{2}{5} =$
答案:
$\frac{1}{4} + \frac{2}{4} =$
答案:
$\frac{3}{8} + \frac{4}{8} =$
答案:
$\frac{2}{5} + \frac{3}{5} =$
答案:
$\frac{3}{7} + \frac{2}{7} =$
答案:
$\frac{2}{10} + \frac{5}{10} =$
答案:
$\frac{1}{5} + \frac{1}{5} =$
答案:
$\frac{4}{8} + \frac{4}{8} =$
答案:
$1 - \frac{2}{6} =$
答案:
$1 - \frac{2}{5} =$
答案:
$1 - \frac{1}{2} =$
答案:
$1 - \frac{1}{4} =$
答案:
$\frac{6}{9} - \frac{2}{9} =$
答案:
$\frac{5}{8} - \frac{1}{8} =$
答案:
填一填。
( ) + $\frac{2}{6} = 1 - \frac{1}{6}$
$\frac{7}{8} - \frac{3}{8} = \frac{1}{8} + \frac{1}{8} +$ ( )
( ) + $\frac{2}{6} = 1 - \frac{1}{6}$
$\frac{7}{8} - \frac{3}{8} = \frac{1}{8} + \frac{1}{8} +$ ( )
答案:
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