七年级数学上册基本计算题练习 (150)
(+3.7)×(-0.2)= 15×(+3)+(+2)= (+8.6)+(-1)= 7-(-3)+(-8)= (+5.5)+(-0.9)= 19×(+6)-(+2)= (-7)×(-9)= 8×(+6
七年级数学上册基本计算题练习 (150)