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Place a decimal point in each sum without calculating. Show your thinking.

Place a decimal point in each sum without calculating. Show your thinking. 631.5 + 902.4 + 217.83 = 175173. Place a decimal point in each sum without calculating. Show your thinking. 631.5 + 902.4 + 217.83 = 175173. 600 + 900 + 200 = 1700. The answer is 1751.73.

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Place a decimal point in each sum without calculating. Show your thinking.

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  1. Place a decimal point in each sum without calculating. Show your thinking. 631.5 + 902.4 + 217.83 = 175173

  2. Place a decimal point in each sum without calculating. Show your thinking. 631.5 + 902.4 + 217.83 = 175173 600 + 900 + 200 = 1700 The answer is 1751.73

  3. Place a decimal point in each sum without calculating. Show your thinking. 587.25 + 22.5 + 117.98 = 72773

  4. Place a decimal point in each sum without calculating. Show your thinking. 587.25 + 22.5 + 117.98 = 72773 600 + 20 + 100 = 720 The answer is 727.73

  5. Place a decimal point in each answer without calculating. Show your thinking. 4.831 + 2.765 = 7596

  6. Place a decimal point in each answer without calculating. Show your thinking. 4.831 + 2.765 = 7596 5 + 3 = 8 The answer is 7.596

  7. Mechanical pencil leads have widths of 0.3mm, 0.5mm, 0.7mm and 0.9mm. How could you lay four leads side by side In order to make a total of exactly 2.0mm? (cannot use 0.5 x 4)

  8. Parcel A is heavier than parcel B by 3.4 kg. Parcel C is lighter than parcel B by 1.25 kg. How heavy is parcel A if parcel C is 5.5 kg?

  9. Parcel A is heavier than parcel B by 3.4 kg. Parcel C is lighter than parcel B by 1.25 kg. How heavy is parcel A if parcel C is 5.5 kg? Parcel A = 10.15kg Parcel B = 6.75kg Parcel C = 5.5kg

  10. Estimate and then use a calculator to determine each answer. 5.25 x 196 =

  11. Estimate and then use a calculator to determine each answer. 5.25 x 196 = 5 X 200 = 1000 Actual answer 1029

  12. 44 x 78 = 3432. Use this answer to find the answer for the following: a. 0.44 x 78 = b. 4.4 x 7.8 = c. 44 x 0.078 = d. 0.44 x 0.078 = e. 440 x 780 =

  13. 44 x 78 = 3432. Use this answer to find the answer for the following: a. 0.44 x 78 = 34.32 b. 4.4 x 7.8 = 34.32 c. 44 x 0.078 = 3.432 d. 0.44 x 0.078 = 0.03432 e. 440 x 780 = 343200

  14. 2.5 x 0.01 = 54.5 x .001 = 895.4 x .1 = 0.25 x .01 =

  15. 2.5 x 0.01 = 0.025 54.5 x .001 = 0.0545 895.4 x .1 = 89.54 0.25 x .01 = 0.0025

  16. A mechanic charges $45/hour to fix a car. If your car is in the shop for 7.5 hours and the parts cost $255.45 how much will the total bill be? Show your calculations.

  17. A mechanic charges $45/hour to fix a car. If your car is in the shop for 7.5 hours and the parts cost $255.45 how much will the total bill be? Show your calculations. 7.5 x 45 + 255.45 = $592.95

  18. A box of 8 books weight 14.5kg. The packing and the empty box weighs 3.2kg. How much does 1 book weigh? Show your calculations. Round to two decimal places.

  19. A box of 8 books weight 14.5kg. The packing and the empty box weighs 3.2kg. How much does 1 book weigh? Show your calculations. Round to two decimal places. 14.5 – 3.2 = 11.3kg 11.3 / 8 = 1.41kg Each book weighs 1.41kg

  20. How many sheets of paper will it take to make a pile 3cm thick if each piece of paper is 1.1mm thick? Hint, you need to convert.

  21. How many sheets of paper will it take to make a pile 3cm thick if each piece of paper is 1.1mm thick? Hint, you need to convert. 30mm / 1.1mm = 27.27 You will need about 27 sheets of paper.

  22. 1 – 1 + 27 / 3 + 12 x 5 + 12

  23. 1 – 1 + 27 / 3 + 12 x 5 + 12 1 – 1 + 9 + 60 + 12 81

  24. 12 + 10 / 1 + 5 – 1 + 1 x 6

  25. 12 + 10 / 1 + 5 – 1 + 1 x 6 12 + 10 + 5 – 1 + 6 32

  26. 8 x 8 + 60 / 6 + 4 + 12 – 2

  27. 8 x 8 + 60 / 6 + 4 + 12 – 2 64 + 10 + 4 + 12 – 2 88

  28. Add brackets to make each statement true. 7 + 30 x 0.5 = 18.5

  29. Add brackets to make each statement true. (7 + 30) x 0.5 = 18.5

  30. Add brackets to make each statement true. 6 + 3 x 0.2 + 0.4 / 2 -1 = 2.2

  31. Add brackets to make each statement true. (6 + 3) x 0.2 + 0.4 / (2 -1) = 2.2

  32. After a 2005 earthquake, 11410kg of rice was distributed in 3260 bags to families in the damaged area. How many kilograms of rice were in each bag, if the bags were the same size?

  33. After a 2005 earthquake, 11410kg of rice was distributed in 3260 bags to families in the damaged area. How many kilograms of rice were in each bag, if the bags were the same size? 11410kg / 3260 = 3.5

  34. After a 2005 earthquake, 11410kg of rice was distributed in 3260 bags to families in the damaged area. If a family used 0.25 kg per day, how many days would 1 bag of rice last? Remember each bag is 3.5 kg

  35. After a 2005 earthquake, 11410kg of rice was distributed in 3260 bags to families in the damaged area. If a family used 0.25 kg per day, how many days would 1 bag of rice last? Remember each bag is 3.5 kg 3.5 / 0.25 = 14 days

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