题目内容
脱式计算
32×46-59 | 38×(62+17) | 320+80×5 | 25×12÷6. |
分析:(1)先算乘法,再算减法;
(2)先算小括号里面的加法,再算括号外的乘法;
(3)先算乘法,再算加法;
(4)按照从左到右的顺序计算.
(2)先算小括号里面的加法,再算括号外的乘法;
(3)先算乘法,再算加法;
(4)按照从左到右的顺序计算.
解答:解:(1)32×46-59,
=1472-59,
=1413;
(2)38×(62+17),
=38×79,
=3002;
(3)320+80×5,
=320+400,
=720;
(4)25×12÷6,
=300÷6,
=50.
=1472-59,
=1413;
(2)38×(62+17),
=38×79,
=3002;
(3)320+80×5,
=320+400,
=720;
(4)25×12÷6,
=300÷6,
=50.
点评: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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