Decimal Division

Which of the following choices reflects the right way to do

 $35.7\div0.3\$  ?

•  $35.7\div3$  

•  $357\div0.3$  

•  $357\div3$  

•  $357\div30$  

 $246.4\div1.25$  

Which of the following choices reflects the right way to the decimal division problem?

•  $2464\div125$  

•  $24640\div125$  

•  $2464\div1.25$  

•  $24.64\div1.25$  

 $4.505\div0.02$  

Which of the following is the correct way to do the decimal division?

•  $450.5\div2$  

•  $4,505\div2$  

•  $45.05\div2$  

•  $4,505\div0.2$  

 $7.5\div0.3$  

 $0.84\div0.12$  

Which of the following is a good estimation?

• $23,568\ \div21\approx24,000\div20\approx120$

• $23,568\div21\approx24,000\div20\approx1,200$

Which estimation is easier to do?

• $71,890,035\div890\approx70.000.000\div900$

• $71,890,035\div890\approx72,000,000\div900$

 $0.0042\div0.0007=6$  

• The quotient is 6 and it is bigger than the dividend and divisor. It is not possible.

• Yes， it is possible.  It means there are 6 groups of seven ten-thousandths in forty-two ten-thousandths

 $0.35\div1.4=0.25$  

• The quotient 0.25 is smaller than the divisor, and smaller than one.  It is not possible.

• Yes, it is possible.  When the divisor is bigger than the dividend, the quotient will be smaller than one.

Will you get the same value when you divide 5 by 0.2 and when you multiply 5 by 5?

• No, you will not get the same answer, because you are doing two different operations, one is division and one is multiplication.

• Yes, it is possible because we have learned that when you divide a number, you will get the same value by changing it a multiplication of its reciprocal. You will get 25 in both operations.