题目内容
脱式计算.
16×7×9 | (24+56)×7 | 568+56÷7 | 143-8×8. |
分析:(1)按照从左到右的顺序计算;
(2)先算小括号里面的加法,再算小括号外的乘法;
(3)先算除法,再算加法;
(4)先算乘法,再算减法.
(2)先算小括号里面的加法,再算小括号外的乘法;
(3)先算除法,再算加法;
(4)先算乘法,再算减法.
解答:解:(1)16×7×9,
=112×9,
=1008;
(2)(24+56)×7,
=80×7,
=560;
(3)568+56÷7,
=568+8,
=576;
(4)143-8×8,
=143-64,
=79.
=112×9,
=1008;
(2)(24+56)×7,
=80×7,
=560;
(3)568+56÷7,
=568+8,
=576;
(4)143-8×8,
=143-64,
=79.
点评:解决本题关键是理清楚运算的顺序,根据运算顺序逐步求解即可.
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