金蝉脱壳． 3060÷15-2.5×1.04 2 3 ÷ 9 5 × 3 4 + 1 下面各题怎样简便就怎样算360÷15-2.5×1.4= ...

3060\u00f715-2.5x36\u53ef\u4e0d\u53ef\u4ee5\u7b80\u4fbf\uff1f

3060\u00f715-2.5x36
= 3060\u00f7(3\u00d75) - (10\u00f74\uff09x36
= 3060\u00f73\u00f75 - 36\u00d710\u00f74
= 1020\u00f75 - 360\u00f74
= 204-90
= 114

\uff081\uff09360\u00f715-2.5\u00d71.4\uff0c=24-2.5\u00d7\uff081+0.4\uff09\uff0c=24-2.5\u00d71-2.5\u00d70.4\uff0c=24-2.5-1\uff0c=21.5-1\uff0c=20.5\uff1b\uff082\uff09 5 6 \u00d7 2 3 + 4 9 \u00f7 1 6 \uff0c= 5 9 + 4 9 \u00d76\uff0c= 5 9 + 24 9 \uff0c= 29 9 \uff1b\uff083\uff090.16+4\u00f7\uff08 3 8 - 1 8 \uff09\uff0c=0.16+4\u00f7 1 4 \uff0c=0.16+16\uff0c=16.16\uff1b\uff084\uff09 3 7 - 2 5 + 4 7 - 3 5 \uff0c=\uff08 3 7 + 4 7 \uff09-\uff08 2 5 + 3 5 \uff09\uff0c=1-1\uff0c=0\uff0e

（1）3060÷15-2.5×1.04， =204-2.6， =201.4； （2） 2 3 ÷ 9 5 × 3 4 + 1 8 ， = 10 27 × 3 4 + 1 8 ， = 5 18 + 1 8 ， = 29 72 ； （3） 4 9 ×[ 3 4 -（ 7 16 - 1 4 ）]， = 4 9 ×[ 3 4 + 1 4 - 7 16 ]， = 4 9 ×[1- 7 16 ]， = 4 9 × 9 16 ， = 1 4 ．

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