三年级乘法计算题 小明做一道乘法计算题3乘三用文字

小明做一道乘法计算题3乘三用文字  

小明做一道乘法计算题3乘三用文字

【题目】解答：3×3＝？

一道乘法公式计算题

原式=1.2345*1.2345+（0.7655+2.469）*0.7655
=1.2345*1.2345+3.2345*0.7655
=1.2345*1.2345+1.2345*0.7655+2*0.7655
=1.2345*（1.2345+0.7655）+2*0.7655
=1.2345*2+2*0.7655
=2*（1.2345+0.7655）
=4

乘法计算题

【口算】
54*24
16*64
26*34
69*92
69*47
28*94
93*13

一道关于乘法公式的计算题

（2）
1.345×0.345×2.69-1.345³-1.345×0.345²
=1.345×(0.345×2.69-1.345²-0.345²)
=1.345×(-1)×(1.345²-2×0.345×1.345+0.345²)
=-1.345×(1.345-0.345)²
=-1.345×1²
=-1.345

小明做一道乘法计算题时,错将一个乘数45看成了54,结果比原来多了180,那么正确

设这个乘数为x。
54x-45x=180
9x=180
x=20
所以这个乘数是20。另外你好像没把问题问完

60道乘法计算题（要3位数乘1位数）

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97乘三十用简便方法计算题

97×30
=(100-3)×30
=100×30-3×30
=3000-90
=2910

计算题一道用乘法公式分解因式

（4a²＋1）²-16a²
平方差公式
=（4a^2+1+4a)(4a^2+1-4a)
完全平方公式
=（2a+1）^2(2a-1)^2

一道初二数学计算题（十字相乘法）

（x²+4x)²-x²-4x-20
=（x²+4x)²-(x²+4x)-20
1 1
4 -5
=（x²+4x+4)(x²+4x-5)

一道数学计算题，关于乘法公式！

(2^2+4^2+6^2+...+100^2)-(1^2+3^2+5^2+...+99^2)
=(2^2-1^2)+(4^2-3^2)+(6^2-5^2)+...+(100^2-99^2)
=(2+1)*(2-1)+(4+3)*(4-3)+(6+5)*(6-5)+...+(100+99)*(100-99)
=2+1+4+3+6+5+...+100+99
=1+2+3+4+5+6+...+99+100
=5050