Numbers to 100 Exercise 01

Answer: C

20 tens is the same as 200.

This is because 20 tens = 20 × 10 = 200.

Answer: D

Let’s count backwards from 88 to fill in the missing number:

88, … , 78, 73

Notice that from 78 to 73, it decreases by 5.

So, let’s apply the same pattern:

78 − 5 = 73

88 − 5 = 83

So, the missing number is 83.

The complete sequence is:

88, 83, 78, 73.

Answer: 

42 more than 31 means you add 42 to 31:

31 + 42 = 73

So, 42 more than 31 is 73 (seventy-three)

Answer: B

12 less than 77 means you subtract 12 from 77:

77 – 12 = 65

So, 12 less than 77 is 65 (sixty-five).

Answer: D

Let’s work it out step by step:

1. Each bundle has 8 sticks.
2. There are 10 bundles.

So, the number of sticks in the bundles is:

10 × 8 = 80 sticks

3. There are also 22 loose sticks.

Now, add the sticks from the bundles and the loose sticks together:

80 + 22 = 102

So, the total number of sticks is 102.

Answer: A

Look at the relationship between the numbers in the first column and the second column:

• 34 → 35 (Add 1)
• 52 → 53 (Add 1)

Following this pattern, we add 1 to the ? in the top row to get 71 in the bottom row.

So, the missing number is:

70

Answer: D

Let’s arrange the numbers from the greatest to the smallest (dari yang terbesar sampai yang terkecil):

90, 89, 88, 72, 34, 23

So, the numbers in order are:

90, 89, 88, 72, 34, 23.

Answer: D

Let’s arrange the numbers from the smallest to greatest (dari yang terkecil sampai yang terbesar):

21, 22, 34, 54, 77, 98. 100

So, the numbers in order are:

21, 22, 34, 54, 77, 98. 100