脱式计算(其中①、②、④、⑤要用简便方法).
①59×
②
③④⑤⑥16-8×.
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解:(1)59×,
=58×+1×,
=17,
=17;
(2),
=()×,
=2×,
=1;
(3),
=,
=;
(4),
=×,
=,
=;
(5),
=2424,
=10+9,
=19;
(6)16-8×,
=16-3,
=13.
解析分析:(1)(2)(5)运用乘法分配律解答,(3)(6)按照先算乘法,再算减法顺序解答,(4)运用乘法交换律解答.
点评:此题主要考查分数、整数、小数的四则混合运算的运算顺序和应用运算定律进行简便计算.