早教吧作业答案频道 -->数学-->
怎样简便就怎样计算.25×7×8420÷4÷535×10256×67+33×5648×25270÷45721-303435-11-49-4062×9983×201-8399×25+25(25+22)×4264×33-64×33107+98+393+202.
题目详情
怎样简便就怎样计算.
25×7×8 | 420÷4÷5 | 35×102 | 56×67+33×56 |
48×25 | 270÷45 | 721-303 | 435-11-49-40 |
62×99 | 83×201-83 | 99×25+25 | (25+22)×4 |
264×33-64×33 | 107+98+393+202. |
▼优质解答
答案和解析
(1)25×7×8
=(25×8)×7
=200×7
=1400
(2)420÷4÷5
=420÷(4×5)
=420÷20
=21
(3)35×102
=35×(100+2)
=35×100+35×2
=3500+70
=3570
(4)56×67+33×56
=56×(67+33)
=56×100
=5600
(5)48×25
=12×4×25
=12×(4×25)
=12×100
=1200
(6)270÷45
=270÷(9×5)
=270÷9÷5
=30÷5
=6
(7)721-303
=721-(300+3)
=721-300-3
=421-3
=418
(8)435-11-49-40
=435-(11+49+40)
=435-100
=335
(9)62×99
=62×(100-1)
=62×100-62×1
=6200-62
=6138
(10)83×201-83
=83×(201-1)
=83×200
=16600
(11)99×25+25
=25×(99+1)
=25×100
=2500
(12)(25+22)×4
=25×4+22×4
=100+88
=188
(13)264×33-64×33
=33×(264-64)
=33×200
=6600
(14)107+98+393+202
=(107+393)+(98+202)
=400+300
=700
=(25×8)×7
=200×7
=1400
(2)420÷4÷5
=420÷(4×5)
=420÷20
=21
(3)35×102
=35×(100+2)
=35×100+35×2
=3500+70
=3570
(4)56×67+33×56
=56×(67+33)
=56×100
=5600
(5)48×25
=12×4×25
=12×(4×25)
=12×100
=1200
(6)270÷45
=270÷(9×5)
=270÷9÷5
=30÷5
=6
(7)721-303
=721-(300+3)
=721-300-3
=421-3
=418
(8)435-11-49-40
=435-(11+49+40)
=435-100
=335
(9)62×99
=62×(100-1)
=62×100-62×1
=6200-62
=6138
(10)83×201-83
=83×(201-1)
=83×200
=16600
(11)99×25+25
=25×(99+1)
=25×100
=2500
(12)(25+22)×4
=25×4+22×4
=100+88
=188
(13)264×33-64×33
=33×(264-64)
=33×200
=6600
(14)107+98+393+202
=(107+393)+(98+202)
=400+300
=700
看了 怎样简便就怎样计算.25×7...的网友还看了以下:
54+39=87-58=44+27=38+25=94-53=53-27=65-48=81÷9=63 2020-04-07 …
质量检测部门对甲、乙两公司销售的电子产品的使用寿命进行跟踪调查,统计结果如下甲公司:6,6,8,8 2020-06-06 …
matlab软件的疑问,希望高手能够给回答啊这是我的矩阵,需要求解特征值与特征向量A=[1,9,9 2020-06-27 …
口算.54÷9×6=72+6=83+9=96÷8÷2=740÷4=64+36=40×6×2=24× 2020-07-09 …
0.56×2.02=4.6×1.9+5.4×1.9=6.5×12.8-6.5×2.8=1.25×0 2020-07-17 …
102×4×5=3×(92-74)=120×2×3=81÷9×67=5×143-276=7×125 2020-07-18 …
能简算的要简算.①(125+9)×8②11.84-7.96-3.04③(124-85)×6÷26④ 2020-07-18 …
直接写得数.1.6+2.4=1-0.97=15×4=4.3÷1000=100+100×0=3.4十4 2020-11-19 …
直接写出得数.57÷1.9=2.5×0.4=6.3÷9=7.6+0.6=10.5-5=200×0.5 2020-11-19 …
福建行测真题数字推理:2,4,6,9,13,19()选项:A.28B.29C.30D.312+4+6 2020-11-21 …