用简便方法计算.(1)0.37×12.5×0.15×8×2(2)17.48×37-174.8×1.9+17.48×82(
来源:学生作业帮 编辑:搜搜考试网作业帮 分类:数学作业 时间:2024/07/28 08:51:50
用简便方法计算.
(1)0.37×12.5×0.15×8×2
(2)17.48×37-174.8×1.9+17.48×82
(3)14.5+7.65×4+25.5+2.35×4+40.
(1)0.37×12.5×0.15×8×2
(2)17.48×37-174.8×1.9+17.48×82
(3)14.5+7.65×4+25.5+2.35×4+40.
![用简便方法计算.(1)0.37×12.5×0.15×8×2(2)17.48×37-174.8×1.9+17.48×82(](/uploads/image/z/3712724-44-4.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%EF%BC%8E%EF%BC%881%EF%BC%890.37%C3%9712.5%C3%970.15%C3%978%C3%972%EF%BC%882%EF%BC%8917.48%C3%9737-174.8%C3%971.9%2B17.48%C3%9782%EF%BC%88)
(1)0.37×12.5×0.15×8×2
=0.37×(12.5×8)×(0.15×2)
=0.37×100×0.3
=37×0.3
=11.1;
(2)17.48×37-174.8×1.9+17.48×82
=17.48×37-17.48×19+17.48×82
=17.48×(37-19+82)
=17.48×100
=1748;
(3)14.5+7.65×4+25.5+2.35×4+40
=(14.5+25.5)+(7.65×4+2.35×4)+40
=40+(7.65+2.35)×4+40
=40+10×4+40
=40+40+40
=120.
再问: 3Q啦,后天开学,我急忙补作业!你帮我2次了
=0.37×(12.5×8)×(0.15×2)
=0.37×100×0.3
=37×0.3
=11.1;
(2)17.48×37-174.8×1.9+17.48×82
=17.48×37-17.48×19+17.48×82
=17.48×(37-19+82)
=17.48×100
=1748;
(3)14.5+7.65×4+25.5+2.35×4+40
=(14.5+25.5)+(7.65×4+2.35×4)+40
=40+(7.65+2.35)×4+40
=40+10×4+40
=40+40+40
=120.
再问: 3Q啦,后天开学,我急忙补作业!你帮我2次了
用简便方法计算.(1)0.37×12.5×0.15×8×2(2)17.48×37-174.8×1.9+17.48×82(
用简便方法计算:17.48×37+174.8×1.9+8.74×88
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