To divide 4200 by 60 using mental math, you can simplify the calculation by breaking it down. First, divide both numbers by 10: 4200 ÷ 10 = 420 and 60 ÷ 10 = 6. Now, you need to calculate 420 ÷ 6, which is 70. Therefore, the quotient of 4200 divided by 60 is 70.
84
0.0071
4.2
60
100
140
679
0.0286
0.0198
70
8.4
4200