怎样算简便就怎样算. 4.32+5.43+6.6817.17-6.8-3.25.29×9+5.2916.8×10.12.74×9.5+5×0.2740.36+9.6÷3.2.
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解:(1)4.32+5.43+6.68,
=4.32+6.68+5.43,
=11+5.43,
=16.43;
(2)17.17-6.8-3.2,
=17.17-(6.8+3.2),
=17.17-10,
=7.17;
(3)5.29×9+5.29,
=5.29×(9+1),
=5.29×10,
=52.9;
(4)16.8×10.1,
=16.8×10+16.8×0.1,
=168+1.68,
=169.68;
(5)2.74×9.5+5×0.274,
=2.74×9.5+0.5×2.74,
=2.74×(9.5+0.5),
=2.74×10,
=27.4;
(6)0.36+9.6÷3.2,
=0.36+3,
=3.36.
解析分析:(1)利用加法交换律解答即可;
(2)利用连续减去两个数等于减去这两个数的和进行简算;
(3)(4)(5)利用乘法分配律简算即可;
(6)按运算顺序解答即可.
点评:此题考查主要根据算式运算符号和数字的特点,灵活运用运算定律进行简便计算.