5.6乘8.8加0.56乘12用简便方法怎么算-搜答案-智慧作业帮

4.4+4.4x12+13x5.6=4.4x(1+12)+5.6x13=4.4x13+5.6x13=(4.4+5.6)x13=10x13=130

=46.3×0.56+53.8×0.56-0.1×0.56=(46.3+53.8-0.1)×0.56=100×0.56=56

(1*2*3+2*4*6+3*6*9+4*8*12)/(3*4*5+6*8*10+9*12*15+12*16*20)=(1*2*3)(1+8+27+64)/(3*4*5)(1+8+27+64)=(1*

5.6×8.8+0.56×12=5.6×8.8+5.6×1.2=5.6×(8.8+1.2)=5.6×10=56

14x44+12x28+32x14=14x44+24x14+32x14=14x(44+24+32)=14x100=1400

设那数为X0.27*5.6+5.6X+5.6*0.25=0.78*0.565.6*(0.27+X+0.25)=0.078*5.60.52+X=0.078X=-0.442

规律为：2n*2(n+1)*2(n+2)*2(n+3)+16当n分别等于1、2、3时,就是你提问中的几个式子.化简为：16n(n+1)(n+2)(n+3)+16

5.6*0.7+0.2*5.6+0.56=5.6*0.7+0.2*5.6+5.6*0.1=5.6*（0.7+0.2+0.1）=5.6*1=5.6

由题意可得an=n*(n+1)=n^2+n所以可得和为S=(1^2+2^2+3^2+...+12^2)+(1+2+3+...+12)点到这里,接下来你应该知道怎么办啦

5.6*69.32+138.64*0.05+693.2*0.43=5.6*0.1*693.2+693.2*0.2*0.05+693.2*0.43=0.56*693.2+693.2*0.01+693.2

180

9.9*5.6+0.56=9.9*0.56*10+0.56=99*0.56+0.56=0.56*(99+1)=0.56*100=56再问：4.4*5.5-44*0.33-0.44*22

等于0.56乘33加0.56乘77减0.56再问：得数是多少再答：61.04

5.6*69.32+138.64*0.05+693.2*0.43=5.6*69.32+69.32*0.1+69.32*4.3=69.32*(5.6+0.1+4.3)=69.32*10=693.2

再问：有没有其他方案再答：应该没有了吧

73×10+73×12-73×18=73×（10+12-18）=73×4=292

它们都是平方数规律：2n*(2n+2)(2n+4)(2n+6)+16=2[n(n+1)(n+2)(n+3)]+16=16n(n+1)(n+2)(n+3)+16=16[n(n+1)(n+2)(n+3)+

46.1×0.56＋5.38×5.6＋1×0.056＝46.1×0.56＋53.8×0.56＋0.1×0.56＝0.56×（46.1＋53.8＋0.1）＝0.56×100＝56