小学3年级题！！20分

来源：百度知道 编辑：UC知道 时间：2024/06/14 08:31:55
1 、 5.4×3.8-6.5×4.4+2.7×5.4 2 、76.5×10.1 3、0.125×6.4×2.5×0.5 4、0.175÷25×4
几题怎么简算 急！！！！
快~！ 简算~~~~~~~~~~~~~~~~~~ 我加分 求求你们了 快啊!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

1 、 5.4×3.8-6.5×4.4+2.7×5.4
=5.4*(3.8+2.7)-6.5*4.4
=5.4*6.5-6.5*4.4
=6.5*(5.4-4.4)
=6.5*1
=6.5
2 、76.5×10.1
=76.5*10+76.5*0.1
=756+7.65
=763.65
3、0.125×6.4×2.5×0.5
=0.125*8*0.4*2*2.5*0.5
=(0.125*8)*(0.4*2.5)*(0.5*2)
=1
4、0.175÷25×4
=(0.175*4)/(25*4)*4
=0.7/100*4
=0.007*4
=0.028

1,原式=5.4(3.8+2.7)-6.5×4.4=5.4×6.5-6.5×4.4=6.5（5.4-4.4）=6.5
2，原式=76.5（10+0.1）=76.5×10+76.5×0.1=765+7.65=772.65
3，原式=0.125×8×0.8×2.5×0.5=1×2×0.5=1
4，原式=0.007×25/25×4=0.028

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