能简便的要用简便运算0.027+9.9×0.27 1.25×4×2.5×89.9×9.81 &nb...
能简便的要用简便运算0.027+9.9×0.271.25×4×2.5×89.9×9.81518×14×910（14+29）×361-57+13．...
能简便的要用简便运算0.027+9.9×0.27 1.25×4×2.5×89.9×9.81 518×14×910（14+29）×36 1-57+13．
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①0.027+9.9×0.27
=0.27×0.1+9.9×0.27
=0.27×（0.1+9.9）
=0.27×10
=2.7
②1.25×4×2.5×8
=（1.25×8）×（4×2.5）
=10×10
=100
③9.9×9.81
=（10-0.1）×9.81
=10×9.81-0.1×9.81
=98.1-0.981
=97.119
④
×
×
=
×
×
=
⑤（
+
）×36
=
×36+
×36
=9+8
=17
⑥1-
+
=
+
=
+
=
=0.27×0.1+9.9×0.27
=0.27×（0.1+9.9）
=0.27×10
=2.7
②1.25×4×2.5×8
=（1.25×8）×（4×2.5）
=10×10
=100
③9.9×9.81
=（10-0.1）×9.81
=10×9.81-0.1×9.81
=98.1-0.981
=97.119
④
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