11-1.25-0.75+1.89的简便运算,要递等式的,
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11-1.25-0.75+1.89的简便运算,要递等式的,
11-1.25-0.75+1.89
=11-(1.25+0.75)+1.89
=11-2+1.89
=9+1.89
=10.89
=11-(1.25+0.75)+1.89=10.89
11-1.25-0.75+1.89的简便运算,要递等式的,
11-1.25-0.75+1.89
=11-(1.25+0.75)+1.89
=11-2+1.89
=9+1.89
=10.89
=11-(1.25+0.75)+1.89=10.89