Divide 4300 by 50 in your head

Question

Dividing by 50 head-on is clumsy; there's a two-step reframe. Solve in your head. What is 4300 \div 50? Aim: under 8 seconds.

Accepted Answer

Since 50 = 	frac{100}{2}, dividing by 50 is the same as dividing by 100 and doubling: \frac{4300}{50} = \frac{4300}{100} 	imes 2 = 43 	imes 2 = 86. So 4300 \div 50 = \mathbf{86}. Chop two zeros to get 43, then double. Takeaway. Divide by 50 = "divide by 100, then double." Similarly divide by 25 = "divide by 100, then times 4." Convert to a power of ten and adjust.

Divide 4300 by 50 in your head

Your answer

More Mental Math questions