概要: -(- 25 ) × + 25× (- 36 ) × ( + - )=25 × ( + + ) = - 1 6 - 3 0+21= 25× 1 = - 25原则四:巧妙运用运算律( + - + 上一页 [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] [37] [38] [39] 下一页
5.9 有理数的混合运算练习题(二),标签:六年级数学试卷大全,http://www.youer8.com
=25 × ( +
+
) = - 1 6 - 3 0+21
= 25× 1 = - 25
原则四:巧妙运用运算律
( +
-
+
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