9.9x6.6+6.3x10.2简便计算?
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9.9×6.6+6.3×10.2
=(10-1)×6.6+6.3(10+0.2)
=66-6.3+63+1.26
=129-6.3+1.26
=130.26-6.3
=123.96
=(10-1)×6.6+6.3(10+0.2)
=66-6.3+63+1.26
=129-6.3+1.26
=130.26-6.3
=123.96
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简便计算方法是:
9..9x6.6+6.3x10.2
=65.34+64.26
=129.6
9..9x6.6+6.3x10.2
=65.34+64.26
=129.6
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9.9×6.6+6.3×10.2
=(10-0.1)×6.6+6.3×(10+0.2)
=10×6.6-0.1×6.6+6.3×10+6.3×0.2
=66-0.66+63+1.26
=129+(1.26-0.66)
=129+0.6
=129.6
=(10-0.1)×6.6+6.3×(10+0.2)
=10×6.6-0.1×6.6+6.3×10+6.3×0.2
=66-0.66+63+1.26
=129+(1.26-0.66)
=129+0.6
=129.6
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9.9x6.6+6.3x10.2
=6.6(10-0.1)+6.3(10+0.2)
=66-0.66+63+1.26
=129+0.6=129.6
=6.6(10-0.1)+6.3(10+0.2)
=66-0.66+63+1.26
=129+0.6=129.6
追答
9.9x6.6+6.3x10.2
=6.6(10-0.1)+6.3(10+0.2)
=66-0.66+63+1.26
=129+0.6=129.6
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原式变为:
(10-0.1)ⅹ6.6+6.3ⅹ(10+0.2)
=66-0.66+63+1.26
=129+0.6
=129.6
(10-0.1)ⅹ6.6+6.3ⅹ(10+0.2)
=66-0.66+63+1.26
=129+0.6
=129.6
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