题目内容
脱式计算. 200-28×5 |
(144-72)÷8 |
16×(527-488) | 54+783÷27 |
205-58+42 | (312+436)÷34. |
分析:(1)先算乘法,再算减法;
(2)先算小括号里面的减法,再算括号外面的除法;
(3)先算小括号里面的减法,再算括号外面的乘法;
(4)先算除法,再算加法;
(5)从左往右依次计算即可;
(6)先算小括号里面的加法,再算括号外面的乘法.
(2)先算小括号里面的减法,再算括号外面的除法;
(3)先算小括号里面的减法,再算括号外面的乘法;
(4)先算除法,再算加法;
(5)从左往右依次计算即可;
(6)先算小括号里面的加法,再算括号外面的乘法.
解答:解:(1)200-28×5
=200-140
=60;
(2)(144-72)÷8
=72÷8
=90;
(3)16×(527-488)
=16×39
=624;
(4)54+783÷27
=54+29
=83;
(5)205-58+42
=147+42
=189;
(6)(312+436)÷34
=748÷34
=22.
=200-140
=60;
(2)(144-72)÷8
=72÷8
=90;
(3)16×(527-488)
=16×39
=624;
(4)54+783÷27
=54+29
=83;
(5)205-58+42
=147+42
=189;
(6)(312+436)÷34
=748÷34
=22.
点评:此题主要考查整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.
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