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43X98用简便方法计算
怎样
简便计算
1到100
的
乘法算式?
答:
x(41x42x
43
x44x45x46x47x48x49x50)x(51x52x53x4x55x56x57x58x59x60)x(61x62x63x64x65x66x67x68x69x70)x(71x72x73x74x75x76x77x78x79x80)(81x82x83x84x85x86x87x88x89x90)x(90x91x92x93x94x95x96x97
x98
x99x100) 好象是这么算得 应该最
简便
了 你
算算
看 ...
如何
计算
两个数
的
积?
答:
x(41x42x
43
x44x45x46x47x48x49x50)x(51x52x53x4x55x56x57x58x59x60)x(61x62x63x64x65x66x67x68x69x70)x(71x72x73x74x75x76x77x78x79x80)(81x82x83x84x85x86x87x88x89x90)x(90x91x92x93x94x95x96x97
x98
x99x100) 好象是这么算得 应该最
简便
了 你
算算
看 ...
怎么用1到100
的
数字
算出
乘数呢?
答:
x(41x42x
43
x44x45x46x47x48x49x50)x(51x52x53x4x55x56x57x58x59x60)x(61x62x63x64x65x66x67x68x69x70)x(71x72x73x74x75x76x77x78x79x80)(81x82x83x84x85x86x87x88x89x90)x(90x91x92x93x94x95x96x97
x98
x99x100) 好象是这么算得 应该最
简便
了 你
算算
看 ...
用简便方法计算43
x99-35
x98
答:
43
*99-35*98 =43*(98+1)-35*98 =43*98+43*1-35*98 =(43-35)*98+43 =8*98+43 =8*(100-2)*43 =8*100-8*2+43 =800-16+43 =800+27 =827
23×33+34×33-
43
×17+46×24
的简便计算
?
答:
23×33+34×33-
43
×17+46×24 【各因式重新组合】=(34×33-43×17)+(23×33++46×24)【第一个括号提取17,第二个括号提取23】=17x(66-43)+23x(33+48)=17x23+23x81 【提取23】=23x(17+81)=23
x98
=23x(100-2)=2300-46 =2254 ...
用简便方法计算43
×98+86
答:
43x98
+86 =43x(98+2)=43x100 =4300
能
简便的用简便计算
0.24×1.2×150 0.8×0.9÷0.8×0.9 9.9×
4.3
8.12...
答:
0.24×1.2×150 =(0.24×30)×(1.2×5)=7.2×6 =
43
.2 0.8×0.9÷0.8×0.9 =(0.8÷0.8)×(0.9×0.9)=1×0.81 =0.81 9.9×
4.3
=10×4.3-0.1×4.3 =43-0.43 =42.57 8.12×98+8.12×2 =8.12×(98+2)=8.12×100 =812 6.4×(0.125+12.5)...
1乘以2乘以3...乘以100=?拜托了各位 谢谢
答:
x(41x42x
43
x44x45x46x47x48x49x50)x(51x52x53x4x55x56x57x58x59x60)x(61x62x63x64x65x66x67x68x69x70)x(71x72x73x74x75x76x77x78x79x80)(81x82x83x84x85x86x87x88x89x90)x(90x91x92x93x94x95x96x97
x98
x99x100) 好象是这么算得 应该最
简便
了 你
算算
看 ...
<涓婁竴椤
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