分析:根據(jù)算式的特點(diǎn),可交換-
與
的位置,然后再進(jìn)行計(jì)算即可得到答案.
點(diǎn)評(píng):解答此題的關(guān)鍵是交換-
與
的位置,然后再根據(jù)加減法的混合運(yùn)算進(jìn)行計(jì)算即可.
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