[Dividend’s ten digit is not divisible by divisor] For problems such as 72 ÷ 3, split the dividend into two numbers that add up to 72 and are both easily divisible by 3. For example, it can be split into 60 + 12, 30 + 42, 36 + 36, etc. However, it is often better to divide the number into a large divisible tens number [such as 60 in this case] so that the second part will be smaller and easy to divide. 72 ÷ 3 = [60 ÷ 3] + [12 ÷3] = 20 + 4 = 24 Practice 1: 96 ÷ 4 96 = 80 + 16 80 ÷ 4 = (20) 16 ÷ 4 = (4) (20) + (4) = (24) [There are many suitable numbers that could have been used in place of 80 and 16, but these are the easiest.] Practice 2: 56 ÷ 2 56 = 50 + (6) 50 ÷ (2) = (25) (6) ÷ (2) = (3) (25) + (3) = (28)
Delicious