计算下面各题,能简算的要简算.(1)975-384÷16×25?
1个回答
展开全部
解题思路:算式(1)颤培颤(2)根据四则混合运算的运算顺序计算即可:先算乘除,再算加减,有括号的要先算括号里面的;
算式(3)可将式中中搜分数化为小数后,根据加法交换律及结合律进行计算;
算式(4)(6)可根据乘法分配律进行计算;
算式(5)可将式中32拆分为8×4后再根据乘法结合律计算.
(1)975-384÷16×25
=975-24×25,
=975-600,
=375;
(2)[39/144]÷([5/6]+[1/4])+1.65
=[39/144]÷([10/12]+[3/12])+1.65,
-[39/144]×[12/13]+1.65,
=[1/4]+1.65,
=0.25+1.65,
=1.9;
(3)5.25+3[4/5]-1.8+2[3/4]
=5.25+3.8-1.8+2.75,
=5.25+2.75+(3.8-1.8),
=8+2,
=10;
(4)[96/17]×1.5-1.5×[45/17]
=([96/17]-[45/17])×1.5,
=3×1.5,
=4.5;
(5)12.5×0.25×32
=12.5×0.25×8×4,
=(12.5×8)×(0.25×4),
=100×1,
=100;
(6)36×([5/18]+[2/9])÷2%
=[36×[5/18]+36×[2/9]]÷2%,
=[10+8]÷2%,
=18÷2%,
=900.
,9,计算下面各题,能简算的要简算.
(1)975-384÷16×25 (2)[39/144]÷([5/6]+[1/4])+1.65 (3)5.25+3[4/5]-1.8+2[3/4] (4)[96/茄败17]×1.5-1.5×[45/17] (5)12.5×0.25×32 (6)36×([5/18]+[2/9])÷2%
算式(3)可将式中中搜分数化为小数后,根据加法交换律及结合律进行计算;
算式(4)(6)可根据乘法分配律进行计算;
算式(5)可将式中32拆分为8×4后再根据乘法结合律计算.
(1)975-384÷16×25
=975-24×25,
=975-600,
=375;
(2)[39/144]÷([5/6]+[1/4])+1.65
=[39/144]÷([10/12]+[3/12])+1.65,
-[39/144]×[12/13]+1.65,
=[1/4]+1.65,
=0.25+1.65,
=1.9;
(3)5.25+3[4/5]-1.8+2[3/4]
=5.25+3.8-1.8+2.75,
=5.25+2.75+(3.8-1.8),
=8+2,
=10;
(4)[96/17]×1.5-1.5×[45/17]
=([96/17]-[45/17])×1.5,
=3×1.5,
=4.5;
(5)12.5×0.25×32
=12.5×0.25×8×4,
=(12.5×8)×(0.25×4),
=100×1,
=100;
(6)36×([5/18]+[2/9])÷2%
=[36×[5/18]+36×[2/9]]÷2%,
=[10+8]÷2%,
=18÷2%,
=900.
,9,计算下面各题,能简算的要简算.
(1)975-384÷16×25 (2)[39/144]÷([5/6]+[1/4])+1.65 (3)5.25+3[4/5]-1.8+2[3/4] (4)[96/茄败17]×1.5-1.5×[45/17] (5)12.5×0.25×32 (6)36×([5/18]+[2/9])÷2%
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询