题目内容
计算
7
|
17.48×27+1.9×174.8-1.748×460. |
分析:(1)同时计算除法和乘法,再算减法;
(2)先根据积不变规律,把1.9×174.8变成19×17.48,1.748×460变成17.48×46,再运用乘法分配律简算.
(2)先根据积不变规律,把1.9×174.8变成19×17.48,1.748×460变成17.48×46,再运用乘法分配律简算.
解答:解:(1)7
÷0.24-2
×0.875,
=30-2,
=28;
(2)17.48×27+1.9×174.8-1.748×460,
=17.48×27+19×17.48-17.48×46,
=17.48×(27+19-46),
=17.48×0,
=0.
1 |
5 |
2 |
7 |
=30-2,
=28;
(2)17.48×27+1.9×174.8-1.748×460,
=17.48×27+19×17.48-17.48×46,
=17.48×(27+19-46),
=17.48×0,
=0.
点评:本题考查了四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算定律进行简便计算.
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