概要:原则二:凑整, 0.25+0.75=1 + =1 0.25+ =1 抵消:和为零有理数减法7 - 9 ―7―9 0 - ( - 9) ( - 25) - ( - 13) = - 2 = - 16 =9 = - 128.2―(―6.3) ( - 3 ) - 5 ( - 12.5) - ( - 7.5) =1 4.5 = - 8 = - 5( - 26)―( - 12)―12―18 ―1―( - )―(+ ) ( - )― (- ) ― 上一页 [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17
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有理数减法
7 - 9 ―7―9 0 - ( - 9) ( - 25) - ( - 13)
= - 2 = - 16 =9 = - 12
8.2―(―6.3) ( - 3 ) - 5
( - 12.5) - ( - 7.5)
=1 4.5 = - 8 = - 5
( - 26)―( - 12)―12―18 ―1―( - )―(+
) ( -
)― (-
) ―
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