六年级数学单元二《分数、小数与百分比》

• 1

Answer explanation

To divide a fraction by a whole number, multiply the reciprocal of the whole number. Therefore, 1/2 ÷ 2 = 1/2 * 1/2 = 1/4.

• 4

• 1

Answer explanation

To divide fractions, multiply by the reciprocal of the divisor. So, \(\frac{4}{5}\div\frac{1}{5} = \frac{4}{5}\times\frac{5}{1} = 4\). Therefore, the correct answer is 4.

Answer explanation

To divide fractions, multiply by the reciprocal. 3 3/4 ÷ 3/7 = 15/4 ÷ 3/7 = 15/4 * 7/3 = 105/12 = 8 3/4

• 2.16

• 2.61

• 1.56

• 1.65

Answer explanation

To find the product of 1.35 and 1.6, multiply the two numbers: 1.35 * 1.6 = 2.16. Therefore, the correct answer is 2.16.

• 114.48

• 112.48

• 105.48

• 120.48

Answer explanation

To find the product of 47.7 and 2.4, multiply the two numbers: 47.7 * 2.4 = 114.48. Therefore, the correct answer is 114.48.

• 4.8

• 2.3

• 3.5

• 2.6

Answer explanation

To divide 6.5 by 2.5, you simply perform the division operation which equals 2.6. Therefore, the correct answer is 2.6.

• 489.60

• 611.88

• 612.00

• 611.84

Answer explanation

To divide 489.504 by 0.8, we get 611.88. Therefore, the correct answer is 611.88.

8. 8. 把1.2化为百分比。

9. 9. 把2.5化为百分比。