一、我会做(36分)
1、看谁算的又对又快。(6分)
12 +12 = 12 +13 = 79 —19 = 56 —23 =
1—511 = 34 +34 = 27 —27 = 1— 613 =
712 +16 = 45 —15 = 14 +34 = 13 +38 =
2、细心算(6分)
79 —23 +29 = 12 +13 +14 = 15 +38 +45 =
47 +29 —47 = 1— 16 —56 = 15 +38 +45 =
3、圈出最简分数,把其余分数约分成最简分数。(6分)
1618 6390 1216
718 51
参考资料:http://www.21cnjy.com/H/3/49321/832904.shtml