Estimating Quantities and Operations

If Mang Juan harvested 345 mangoes and plans to divide them equally into 5 baskets, which is the best estimate of how many mangoes will be in each basket?

Answer explanation

To estimate, divide 345 by 5. A close estimate is 350 ÷ 5 = 70. Thus, each basket will have about 70 mangoes.

Aling Nena is dividing 2,456 candies among 12 children. Which of the following is the best estimate for how many candies each child will receive?

Answer explanation

To estimate, round 2,456 to 2,400 and divide by 12. 2,400 ÷ 12 = 200. Thus, each child will receive about 200 candies, making 200 the best estimate.

A sari-sari store owner has 3,120 eggs and plans to put them in cartons of 15. What is the best estimate of how many cartons she will need?

Answer explanation

To find the number of cartons needed, to estimate using compatible 3,120 round off to 3 000 then divide the total eggs by the number of eggs per carton (15) because 15 is compatible to 3 000. So, 3,000 ÷ 15 = 200. Therefore, the best estimate is 200 cartons.

Divide 3,602 by 18. What is the closest estimated quotient using multiples of 10?

Answer explanation

To estimate 3,602 divided by 18, round 3,602 to 3,600 using compatible, Since 18 is compatible to 3 600. Then, 3,600 ÷ 20 = 200. Thus, the closest estimated quotient is 200.

A jeepney driver earned 5,678 pesos in a day and he wants to distribute it among his 25 family members. Which is the best estimate of how much each member will receive?

Answer explanation

To estimate, divide 5,678 by 25. Rounding 5,678 to 6 000 and 25 to 30. makes it easier: 6 000 ÷ 30 = 200. Thus, each family member will receive about 200 pesos.

To solve 345 + 56 - 23, we must first perform the addition before subtraction according to MDAS rules. True or False

Answer explanation

It is True to solve 345 + 56 - 23, we must first perform the addition before subtraction according to MDAS rules

The number sentence for “Darna bought 6 packs of candies, each containing 12 candies” is

If a school has 1,234 students and each classroom can accommodate 30 students, an estimated number of classrooms needed is 40.

The number sentence for “Lito had 48 oranges, he gave 12 to his friend and ate 6 himself” is

To solve 90 ÷ 5 + 7, we must first divide 90 by 5, then add 7.

Answer explanation

TRUE, Follow the MDAS rule