小学二年级数学四则运算混合口算练习(5)
奥数网
2016-09-27 14:39:47
70–30+6=
46+40+2=
99–9–40=
5+70–5=
9+7+20=
14–5+30=
30+6+4=
70–30+6=
46+40+2=
99–9–40=
5+70–5=
9+7+20=
14–5+30=
30+6+4=