5×99+5= 47×78-376= 56×101= 37×27= 81×37-7×81= 75×99+75= (25+
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/09/20 15:43:52
5×99+5= 47×78-376= 56×101= 37×27= 81×37-7×81= 75×99+75= (25+50)×40=
5×99+5= 5×(99+1) = 5×100 = 500
47×78-376 = 47×(78-8) = 47×70 = 3290
56×101= 56×(100+1) = 5600 + 56 = 5656
37×27= (32+5)×(32-5) = 32² - 5² = 1024 - 25 = 999
81×37-7×81= 81×(37-7) = 81×30 = 2430
75×99+75= 75×(99+1) = 75×100 = 7500
(25+50)×40= (1+2)×25×40 = 3×1000 = 3000
47×78-376 = 47×(78-8) = 47×70 = 3290
56×101= 56×(100+1) = 5600 + 56 = 5656
37×27= (32+5)×(32-5) = 32² - 5² = 1024 - 25 = 999
81×37-7×81= 81×(37-7) = 81×30 = 2430
75×99+75= 75×(99+1) = 75×100 = 7500
(25+50)×40= (1+2)×25×40 = 3×1000 = 3000
5×99+5= 47×78-376= 56×101= 37×27= 81×37-7×81= 75×99+75= (25+
99-17=81 99-27=72 99-36=63规律是
英文;12+15=27,25—7=18,33*3=99,81除9=9,9+6—5=10,4*6+16=40,一个聪明女孩
99-18=81,99-27=72,99-36=63,99-45=54求同类题解答,
5*132*2= (25*5)*4= 88*199+88= 47*99= 101*23= 25*44= (125+12)
90°3'-78°56‘27”+37°54'5"=
99+(25*78)=
用简变算托式125*37+125*62+125 99*99+99 = = = = = =
1=7 2=17 3=37 4=47 5=57 6=67 7=?
1=7,2=37,3=47,4=57,5=67,7=77,8=?
99-18=81 99-27=72 99-36=63这些等式有什么规律
25×(37+37+37×37)=?