Question

Amy collected 36 red, 53 blue, 27 green, and 44 yellow pebbles. How many pebbles did she collect in total?

• A. 160
• B. 155
• C. 146
• D. 150

Answer 1

The correct option is A 160

Given, Amy collected 36 red, 53 blue, 27 green, and 44 yellow pebbles.
So, the total number of pebbles = 36 + 53 + 27 + 44

Let’s use decomposition to expand the number of colored pebbles.
36 = 30 + 6
53 = 50 + 3
27 = 20 + 7
44 = 40 + 4

Let’s add all the tens and ones separately.
30 + 50 + 20 + 40 = 140
6 + 3 + 7 + 4 = 20
We get 14 tens and 20 ones.
140 + 20 = 160

So, 36 + 53 + 27 + 44 = 160
So, Amy collects 160 pebbles in total.