B. Fill in the boxes.
70 + 5 = 47 + 0 =
6 tens and 4 ones = 7 tens and 7 ones =
C. Write the number shown on the abacus.
T O T O T O
D. Write >, < or = in the boxes.
44 74 86 89 84 48
67 57 35 95 90 90
E. Arrange in ascending order.
99 49 69
89 79
F. Arrange in descending order.
11 98 71
64 43
82