Mathematical calculation question bank of grade one in primary school
It means: the little squirrel subtracts 30 from each number in the crown to calculate the number; The little monkey subtracts 3 from each number in the canopy, which is faster than who to whom. Squirrel: Little monkey: 36-30=6, 36-3=33 74-30=44, 74-3=7 1 53-30=23, 53-3=50 68-30=38, 68-3 = 65 85.