Đặt tính rồi tính

----- Nội dung dịch tự động từ ảnh -----
Câu 5. Đặt tính rồi tính:
a) 30 219 +15 431
b) 48 769 – 2 312
c) 320 x 415
d)
8346: 26
III
II III II III I
III IIIIIIII IIIII IIIIIIII IIIIIIIIIIIIII IIIIIIII IIIII II
IIII IIIIIII
IIIIIIIIIIIIIIIIII IIIIII IIIIIIII
IIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIRIIIIIIIIR IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIRI IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIII