题目内容
脱式计算下列各题.
(1)13.7+8.65-9.628
(2)12.8-(4.38+1.614)
(1)13.7+8.65-9.628
(2)12.8-(4.38+1.614)
分析:(1)先算加法,再算减法;
(2)先计算括号里面的加法,再计算括号外面的减法.
(2)先计算括号里面的加法,再计算括号外面的减法.
解答:解:(1)13.7+8.65-9.628,
=22.35-9.628,
=12.722;
(2)12.8-(4.38+1.614)
=12.8-5.994
=6.806.
=22.35-9.628,
=12.722;
(2)12.8-(4.38+1.614)
=12.8-5.994
=6.806.
点评:考查了四则混合运算,注意运算顺序和运算法则.
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