下面各题怎样算简便就怎样算.①(12-27)×14②413×17+413×67③15×(9.6-8.6)÷1.2④15-920-35⑤(10×25+6)×1314⑥23×[1-(13-14)]×511.-数学
题文
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答案
①(
=
=7-4, =3; ②
=(
=1×
=
③15×(9.6-8.6)÷1.2 =15×1÷1.2, =15÷1.2, =12.5; ④15-
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题文
|
答案
①(
=
=7-4, =3; ②
=(
=1×
=
③15×(9.6-8.6)÷1.2 =15×1÷1.2, =15÷1.2, =12.5; ④15-
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