7.4*9.8-14.5简算
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 21:41:42
![7.4*9.8-14.5简算](/uploads/image/f/385744-40-4.jpg?t=7.4%2A9.8-14.5%E7%AE%80%E7%AE%97)
=4.5*0.98+0.98*5.5=0.98*(4.5+5.5)=0.98*10=9.8
=7.4*25+25*(5.2/2)=7.4*25+25*2.6=25*(7.4+2.6)=25*10=250
(17.4-7.4)×1.43
4.5*(1-0.2)*1=4.5*0.8=3.6
/>12.6-3.28+7.4-5.72=(12.6+7.4)-(3.28+5.72)=20-9=11
3.7x10-3.7x0.2=37-0.74=36.26
199.8+99.8+9.8×0.6=200+100+10×0.6-0.2-0.2-0.2×0.6=300+6--0.2-0.2-0.12=306-0.52=305.48
你再答:等我。再答: 再答: 再答:
原式=7.4*(10-0.2)-14.5=74-1.48-14.5=74-15.98=58.02
14.5*3.6+14.5*7.4-14.5=14.5×(3.6+7.4-1)=14.5×10=145
=(10-0.2)×25再答:=250-5=245
7.4X9.8-14.5=(7.4X10-7.4X0.2)-14.5=(74-1.48)-14.5=72.52-14.5=58.02
9.8=10-0.2原式=10*7.4-0.2*7.4=74-1.48=72.52再问:还有一题是36.1*8.5+39*0.85,刚刚漏了再问:还有一题是36.1*8.5+39*0.85,刚刚漏了再
=7.4x(10-0.2)-14.5=74-1.48-14.5=74-15.98=74-(16-0.02)=58+0.02=58.02
7.4*10-7.4*0.2-14.5
2.5*7.8+7.4*7.8+0.78=7.8(2.5+7.4+0.1)=7.8*10=78
34×2.6+7.4×17×2=34×2.6+7.4×34=34×(2.6+7.4)=34×10=340
7.4-23+4.8-5.9+13-4.1=(7.4+4.8)+(13-23)-(5.9+4.1)=12.2-10-10=2.2-10=-7.8