浙江省温州市三年(20202022)小升初数学卷真题分题型分层汇编12计算题(基础提升)
此题为判断题(对,错)。
A、错误
B、正确
A.笔算
B.估算
C.口算
D.运算
A.错误
B.正确
=(112+2)÷0.8
=142.5.
浙江省温州市三年(2020-2022)小升初数学卷真题分题型分层汇编12计算题(基础提升)一十一分数的四则混合运算(共3小题)21(2020鹿城区)递等式计算,能简算的要简算。9242983.5+7.50.8(+)841(+)22(2020鹿城区)口算与估算。4.7+38.460%69211+1+0.921.4600.25125400.823(2021泰顺县)计算下面各题。(2)(+)7+3822+61.25242.5+7.5一十二整数、分数、小数、百分数四则混合运算(共3小题)24(2021平阳县)递等式计算。(1)2049117.64.2(2)3.49+1.22+0.51(3)2.4+2.4(4)(+)25(2022温州)计算下面各题(能简算的要简算)。80799+8072531()26(2021瑞安市)递等式计算。(1)140+18213(2)25321.25(3)+0.125(4)+(0.5)一十三方程的解和解方程(共11小题)27(2020苍南县)解方程。(1)x+20%x7.2(2):x:2428(2020平阳县)解方程。 (1)2.4x2.42.4(2)29(2020乐清市)求未知数x。(1)3x3.613.5(2)12:x75%:1.530(2020温州)求未知数x(1)(2)5x20%x19.2(3)31(2020瑞安市)解方程或比例。(1)1.2x+x7.2(2):x:32(2020鹿城区)解方程。(1)xx(2)1.5:12:x33(2020永嘉县)求未知数x3x0.250.7:x:34(2022温州)解方程或解比例。50%:xxx9.4535(2021泰顺县)解方程或比例。3(x4)16.8:0.8:x36(2022苍南县)解方程、解比例。2.4+1.6x4.820%:21:x37(2021苍南县)(1):0.1x:36 (2)2.5x3一十四解比例(共2小题)38(2021平阳县)解方程。(1)x+5x2.4(2)x:2240:839(2021瑞安市)解方程或比例。(1)x+3.2521(2)2:x第 15 页 共 15 页参考答案与试题解析一十一分数的四则混合运算(共5小题)21(2020鹿城区)递等式计算,能简算的要简算。9242983.5+7.50.8(+)841(+)【解答】解:(1)924298924(3002)924300+2624+2626(2)3.5+7.50.8(3.5+7.5)0.8110.88.8(3)(+)8484+848428+48676670(4)1(+)11322(2020鹿城区)口算与估算。4.7+38.460%69211+1+0.921.4600.25125400.8【解答】解:4.7+37.78.460%14692114001+1+20.920.811.40.46000.25125400.8100023(2021泰顺县)计算下面各题。(2)(+)7+3822+61.25242.5+7.5【解答】解:(2)(2)4(+)7+55+163822+691.25242.5+7.51.25832.5+7.51032.5+7.5302.5+7.527.5+7.535一十二整数、分数、小数、百分数四则混合运算(共3小题)24(2021平阳县)递等式计算。(1)2049117.64.2(2)3.49+1.22+0.51(3)2.4+2.4(4)(+)【解答】解:(1)2049117.64.22049282021(2)3.49+1.22+0.513.49+0.51+1.224+1.225.22(3)2.4+2.42.4(+)2.412.4(4)(+)25(2022温州)计算下面各题(能简算的要简算)。80799+8072531()【解答】解:(1)80799+807807(99+1)80710080700(2)2531(3)1()126(2021瑞安市)递等式计算。(1)140+18213(2)25321.25(3)+0.125(4)+(0.5)【解答】解:(1)140+18213140+14154(2)25321.2525(48)1.25(254)(81.25)100101000(3)+0.125(+0.125)1(4)+(0.5)+一十三方程的解和解方程(共11小题)27(2020苍南县)解方程。(1)x+20%x7.2(2):x:24【解答】解:(1)x+20%x7.2 1.2x7.2 1.2x1.27.21.2 x6(2):x:24 x18 x18 x4528(2020平阳县)解方程。 (1)2.4x2.42.4(2)【解答】解:(1)2.4x2.42.4 2.4x2.4+2.42.4+2.4 2.4x4.8 2.4x2.44.82.4 x2(2) 8x121.2 8x814.48 x1.829(2020乐清市)求未知数x。(1)3x3.613.5(2)12:x75%:1.5【解答】解:(1)3x3.613.5 3x3.6+3.613.5+3.6 3x317.13 x5.7(2)12:x75%:1.5 75%x121.575%x75%1875% x2430(2020温州)求未知数x(1)(2)5x20%x19.2(3)【解答】解:(1) 5x1.6+1.60.9+1.6 5x2.5 5x52.55 x0.5(2)5x20%x19.2 4.8x19.2 4.8x4.819.24.8 x4(3) 0.25x1.253.20.25x0.2540.25 x1631(2020瑞安市)解方程或比例。(1)1.2x+x7.2(2):x:【解答】解:(1)1.2x+x7.2 1.8x7.2 1.8x1.87.21.8 x4(2):x: x x x22 x32(2020鹿城区)解方程。(1)xx(2)1.5:12:x【解答】解:(1)xx x x x(2)1.5:12:x 1.5x12 1.5x 1.5x1.51.5 x33(2020永嘉县)求未知数x3x0.250.7:x:【解答】解:(1)3x0.25 3x0.25+0.25+0.25 3x1 3x313 x(2)0.7:x: x0.7 x x34(2022温州)解方程或解比例。50%:xxx9.45【解答】解:(1) 2x89 2x72 2x2722 x36(2)50%:x 50%x 50%x 50%x50%50% x(3)xx9.45 x9.45 x9.45 x35(2021泰顺县)解方程或比例。3(x4)16.8:0.8:x【解答】解:3(x4)16.8 3(x4)316.83 x45.6 x4+45.6+4 x9.6:0.8:x x0.8 x x x36(2022
B.提取失败说
C.压抑说
D.同化说
奥苏伯尔认为,遗忘实际上是知识的组织与认知结构简化的过程。即用高级的概念与规则代替低级的观念,使低级观念发生遗忘,从而提炼和简化了认识并减轻了记忆负担,这是一种积极的遗忘。成年人忘记了脱式计算,却可以进行口算,这是一个认知结构简化的过程。
东汉《周髀算经》是我国现存最早的天文历算和数学著作,书中有比较复杂的分数运算和开平方方法,还最早提出了勾股定理。
正确答案:错误
计算教学中,要注意使学生产生(),建立运算的意识,这样才能把数学知识及其数学思想真正传授给学生。
- A、笔算
- B、估算
- C、口算
- D、运算
正确答案:D
关于计算教学,根据《课程标准》,下列说法不正确的是()
- A、应重视口算,加强估算,鼓励算法多样化
- B、应重视笔算,加强计算的技能性训练
- C、应避免繁杂计算和程式化地叙述“算理”
- D、应避免将运算与应用割裂开来
正确答案:B
关于计算教学,根据《课程标准》,下列说法不正确的是()
- A、应重视口算,加强估算,鼓励算法多样化
- B、应重视笔算,加强计算的技能性训练
- C、应避免繁杂计算和程式化地叙述“算理”
- D、应避免将运算与应用割裂开来
正确答案:B
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