Question

1. reasoning lee and dan have the same number of blocks. lee has 20 green blocks and 36 blue blocks. dan has 13 green blocks, 23 blue blocks, and some red blocks. how many red blocks does dan have?____ red blocks6. assessment practice match each number with the equation it is missing from.$4 + 12 + 5 = 39 - \underline{\quad\quad}$

Explanation:

Step1: Calculate Lee's total blocks

$20 + 36 = 56$

Step2: Calculate Dan's non-red blocks

$13 + 23 = 36$

Step3: Find Dan's red blocks

$56 - 36 = 20$

Step1: Calculate left-hand side sum

$4 + 12 + 5 = 21$

Step2: Solve for the missing number

Let $x$ be the missing number. $21 = 39 - x$
Rearrange to get $x = 39 - 21 = 18$

Answer:

20 red blocks

---