用简便方法计算下列各题(初一)
1.九又十七分之十六×(负51)2.(负48)×5.56+(负48)×4.443.(8减一又三分之一减0.04)÷(三分之四)...
1.九又十七分之十六 × (负51)
2.(负48)×5.56+(负48)×4.44
3.(8减一又三分之一减0.04)÷(三分之四) 展开
2.(负48)×5.56+(负48)×4.44
3.(8减一又三分之一减0.04)÷(三分之四) 展开
展开全部
1.九又十七分之十六 × (负51)
=(9+16/17)*(-51)
=-(9*51+16/17*51)
=-(459+16*3)
=-(459+48)
=-507
2.(负48)×5.56+(负48)×4.44
=(负48)×(5.56+4.44)
=(-48)*10
=-480
3.(8减一又三分之一减0.04)÷(三分之四)
=[8-(1+1/3)-0.04)*(3/4)
=(8-1-1/3-0.04)*(3/4)
=7*(3/4)-(1/3)*(3/4)-(0.04)*(3/4)
=21/4-1/4-0.03
=20/4-0.03
=5-0.03
=4.97
=(9+16/17)*(-51)
=-(9*51+16/17*51)
=-(459+16*3)
=-(459+48)
=-507
2.(负48)×5.56+(负48)×4.44
=(负48)×(5.56+4.44)
=(-48)*10
=-480
3.(8减一又三分之一减0.04)÷(三分之四)
=[8-(1+1/3)-0.04)*(3/4)
=(8-1-1/3-0.04)*(3/4)
=7*(3/4)-(1/3)*(3/4)-(0.04)*(3/4)
=21/4-1/4-0.03
=20/4-0.03
=5-0.03
=4.97
展开全部
1. 九又十七分之十六 × (-51)
=(9+十七分之十六 )×(-51)
=9×(-51)+十七分之十六×(-51)
=-459+(-48)
=-507
2.(-48)×5.56+(-48)×4.44
=(-48)×(5.56+4.44)
=(-48)×10
=-480
3. 8减一又三分之一减0.04)÷(三分之四)
=[8-(1+1/3)-0.04)×(3/4)
=(8-1-1/3-0.04)×(3/4)
=7×(3/4)-(1/3)×(3/4)-(0.04)×(3/4)
=21/4-1/4-0.03
=20/4-0.03
=5-0.03
=4.97
=(9+十七分之十六 )×(-51)
=9×(-51)+十七分之十六×(-51)
=-459+(-48)
=-507
2.(-48)×5.56+(-48)×4.44
=(-48)×(5.56+4.44)
=(-48)×10
=-480
3. 8减一又三分之一减0.04)÷(三分之四)
=[8-(1+1/3)-0.04)×(3/4)
=(8-1-1/3-0.04)×(3/4)
=7×(3/4)-(1/3)×(3/4)-(0.04)×(3/4)
=21/4-1/4-0.03
=20/4-0.03
=5-0.03
=4.97
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询