简便记算1.1.7*25%+8.3除以42.8/9*[3/4-(7/16-0.25)]3.50*12.5*0.2*84.5.16-(4.16-6/7)

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/18 22:21:52
简便记算1.1.7*25%+8.3除以42.8/9*[3/4-(7/16-0.25)]3.50*12.5*0.2*84.5.16-(4.16-6/7)简便记算1.1.7*25%+8.3除以42.8/9

简便记算1.1.7*25%+8.3除以42.8/9*[3/4-(7/16-0.25)]3.50*12.5*0.2*84.5.16-(4.16-6/7)
简便记算
1.1.7*25%+8.3除以4
2.8/9*[3/4-(7/16-0.25)]
3.50*12.5*0.2*8
4.5.16-(4.16-6/7)

简便记算1.1.7*25%+8.3除以42.8/9*[3/4-(7/16-0.25)]3.50*12.5*0.2*84.5.16-(4.16-6/7)
1题=1.7/4+8.3/4=1/4(1.7+8.3)=2.5
2 =8/9*3/4+8/9(7/16-4/16)=2/3+1/6=5/6
3 =(50*25*8)/(2*5)=5*25*2*4=10*100=1000
4 =1+6/7=13/7