- = + = - = - =
+ = - = - = + =
依依看一本书,没看的部分占这本书的几分之几?
300×7= 651×0= + = + =
1500-900= 3700+300= 1- = 1- =
7×9+42= 42+(36-8)= 56+36÷12= 256-26×7=
426×3= 698×8= 6×218= 96×4=
83+25= + = 26÷13= 480×2=
500×8= 490-220= 84÷12= 810+90=
16×3= 1- = 601×5= 201×4=