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(-4有7/8)-(-5有1/2)+(-4有1/4)-3有1/8)(-81)/2有1/4)*4/9/(-16)9948/49*(-7)(用运算律)4(2y+3)=8(1-y)-5(y-2)用度分秒表示10.26°用度分秒表示108.25°用度表示32°7′12″用度表示2430
题目详情
(-4 有7/8)-(-5有1/2)+(-4有1/4)-3有1/8)
(-81)/2有1/4)*4/9/(-16)
9948/49*(-7)(用运算律)
4(2y+3)=8(1-y)-5(y-2)
用度分秒表示 10.26°
用度分秒表示108.25°
用度表示32°7′12″
用度表示2430″
计算30°29′21″+15°40′42″
180°-32°45′13″
25°36′12″*4
109°24′/6
(-81)/2有1/4)*4/9/(-16)
9948/49*(-7)(用运算律)
4(2y+3)=8(1-y)-5(y-2)
用度分秒表示 10.26°
用度分秒表示108.25°
用度表示32°7′12″
用度表示2430″
计算30°29′21″+15°40′42″
180°-32°45′13″
25°36′12″*4
109°24′/6
▼优质解答
答案和解析
(-4 有7/8)-(-5有1/2)+(-4有1/4)-3有1/8)
=(-4-7/8)-(-5-1/2)+(-4-1/4)-(3+1/8)
=-4-7/8+5+1/2-4-1/4-3-1/8
=-4+5-4-3-7/8-1/8+1/2-1/4
=-6-(7/8+1/8)+(1/2-1/4)
=-6-1+1/4
=-6-3/4
=-6又3/4
(-81)/2有1/4)*4/9/(-16)
=(-81)/(2+1/4)*(4/9)/(-16)
=(-81)/(9/4)*(4/9)/(-16)
=(-81)*(4/9)*(4/9)*(-1/16)
=(81/16)*(16/81)
=1
9948/49*(-7)(用运算律)
=-9948/7
=-(9947+1)/7
=-1421-1/7
=-1421又1/7
4(2y+3)=8(1-y)-5(y-2)
2y+3=8-8y-5y+10
2y+8y+5y=8+10-3
15y=15
y=1
用度分秒表示 10.26°=10°15‘36“
用度分秒表示108.25°=108°15’
用度表示32°7′12″=(32+7/60+12/3600)°=32.12°
用度表示2430″=(2430/3600)°=0.675°
计算30°29′21″+15°40′42″=45°69‘63”=45°70’3“=46°10‘3”
180°-32°45′13″=147°14’47“
25°36′12″*4=100°144‘48”=102°24’48“
109°24′/6=18°14‘
=(-4-7/8)-(-5-1/2)+(-4-1/4)-(3+1/8)
=-4-7/8+5+1/2-4-1/4-3-1/8
=-4+5-4-3-7/8-1/8+1/2-1/4
=-6-(7/8+1/8)+(1/2-1/4)
=-6-1+1/4
=-6-3/4
=-6又3/4
(-81)/2有1/4)*4/9/(-16)
=(-81)/(2+1/4)*(4/9)/(-16)
=(-81)/(9/4)*(4/9)/(-16)
=(-81)*(4/9)*(4/9)*(-1/16)
=(81/16)*(16/81)
=1
9948/49*(-7)(用运算律)
=-9948/7
=-(9947+1)/7
=-1421-1/7
=-1421又1/7
4(2y+3)=8(1-y)-5(y-2)
2y+3=8-8y-5y+10
2y+8y+5y=8+10-3
15y=15
y=1
用度分秒表示 10.26°=10°15‘36“
用度分秒表示108.25°=108°15’
用度表示32°7′12″=(32+7/60+12/3600)°=32.12°
用度表示2430″=(2430/3600)°=0.675°
计算30°29′21″+15°40′42″=45°69‘63”=45°70’3“=46°10‘3”
180°-32°45′13″=147°14’47“
25°36′12″*4=100°144‘48”=102°24’48“
109°24′/6=18°14‘
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