Lesson 4 Dive Back Into Division

- Let’s estimate and divide.

Warm-up Notice and Wonder: Blank Spaces

What do you notice? What do you wonder?

$\div$ $= 136$

Activity 1 Reasonable Estimates

Problem 1

Circle the most reasonable estimate. Show your reasoning.

$364 \div 13$
1. $20$
2. $30$
3. $40$
$540 \div 12$
1. $40$
2. $50$
3. $60$
$1, 008 \div 14$
1. $70$
2. $80$
3. $90$

Problem 2

Find the value of each quotient.

Activity 2 Missing Dividends and Divisors

Write different numbers in the blanks that make the equations true.
$\div$ $= 700$
$\div$ $= 78$
$\div$ $= 700$
$\div$ $= 78$
$\div$ $= 700$
$\div$ $= 78$
$\div$ $= 700$
$\div$ $= 78$
$\div$ $= 700$
$\div$ $= 78$
What strategy did you use to choose numbers to write in the blanks?