14-7= 50+16= 45+21= 40+20= 78-8=
61-47= 53-5= 2x5= 87+5= 56+8=
35+28+17= 55-9+7= 71-(40+3)= 64-(30-8)=
90-54=
38+44=
90-47=
37+46-54=
86-(52-28)=
(个)
5×<37 ×7<22 4×<25
49>6× 42>8× 37>9×
□○□=□(根)
□○□○□=□(个)
□○□=□(个)
□○□○□=□(只)