8.) B

9.) 845.1368

10.) B

11.) A

12.) C

13.) B

14.) A

15.) A

16.) C

17.) A

18.) A

19.) B

20.) A

1. Combine 23.456, 90.354 and 345.2

A.485.91 B.458.91 C. 458.90 D. 459.01

Answer: D. 459.01

2. Take away 45.42 from 890.4568

A.845.3168 B. 854.1368 C. 845.0368 D. 856.1368

Answer: C. 845.0368

3. Before the Enhanced Community Quarantine, the weight of Kianne is 56.1 kilograms. By staying at home for 1 month her weight becomes 59.5 kg. How much weight did she gain after the ECQ?

D. 3.4 kg A.3.3kg B. 3.2 kg C. 3.1 kg

Answer: D. 3.4 kg

4.The sum of 2.53 and 4.56 is

A. 6.79 B. 6.78 C. 7.09

Answer: C. 7.09

5. The difference of 16.987 and 7.340 is equal to

A. 10.356 B. 9.647 C. 11.645 D. 5.79

Answer: B. 9.647

11. 656 added to the difference of 898 and 23 765 is

Answer:23,523

Step-by-step explanation:

1.Combine 23.456, 90.354 and 345.2

23.456+90.354= 113.81+345.2= 459.01

2. Take away 45.42 from 890.4568

890.4568 -45.42= 845.0368

3. Before the Enhanced Community Quarantine, the weight of Kianne is 56.1 kilograms. By staying at home for 1 month her weight becomes 59.5 kg. How much weight did she gain after the ECQ?

59.5-56.1=3.4

4.The sum of 2.53 and 4.56 is

2.53+4.56=7.09

5. The difference of 16.987 and 7.340 is equal to

16.987-7.340=9.647

11. 656 added to the difference of 898 and 23 765 is

23 765-898= 22,867

22,867+656=23,523

How to solve decimal?

Using the decimal formula, the number of decimal places in the answer equals the number of zeros in the denominator multiple of 10. A decimal can be converted to a whole number by multiplying it by 10 or a higher power of 10, where the number of decimal digits is equal to the number of decimal digits.