Lesson 10: Multiplying by 9 and Adding
9s
Lesson 6: Algebraic Thinking: Balance
Two
sides of a seesaw have the same weight, if the seesaw is balanced.
The crabs have the same weight. The little crabs have the same
weight.
Exercise 6: Algebraic thinking:
balance.
(1) Two sides of a seesaw have
the same weight, if the seesaw is balanced.
weighs
______ lbs. weighs
_______ oz.
weighs
______ lbs. weighs
______ lbs.
The crabs have the same weight. The crabs have the same weight.
Lesson 8: Ordering the Decimals from
Least to Greatest
What
is the order of these numbers, 0.299,
0.5, 0.1199, 0.39 from the least to the greatest?
0 0.1 0.2 0.3 0.4 0.5 0.6
0.1199 > 0.299 >
0.39 > 0.5
Exercise 8: Order the decimals from the
least to the greatest.
0.36, 0.306,
0.35, 3.06, 36.0
0.306, 0.35, 0.36, 3.06,
36.0,
0.709,
0.079, 0.79, 7.06,
7.1 ______, ______,
______, ______, ______.
0.11,
1.11, 1.01, 0.206,
0.0999 ______, ______,
______, ______, ______.
0.3061,
0.306, 3.05, 30.01, 3.106
______, ______, ______,
______, ______.
0.600, 0.066, 60.00, 0.006, 600.00 ______,
______, ______, ______,
_______.
0.309, 0.039,
0.39, 3.06, 3.1
______, ______, ______,
______, _______.
0.5061,
0.506, 5.05, 50.01, 5.106 _______, ______,
______, ______, _______.
Lesson 7: Critical Thinking: Adding
and Subtracting Ordinal Numbers
A green mantis is the 3rd from the left
in a line, and 5th from the right in the line. How many mantises are
there in line?
What we
know is:
3 + 5 – 1 = 7
the green mantis is counted twice.
5 mantises including the green mantis
from the right
3
mantises including the green mantis from the left
Exercise 7: Critical Thinking: Adding
and Subtracting Ordinal Numbers
(1) A green mantis is the 3rd
from the left in a line, and 8th from the right in the line. How
many mantises are there in line?
(2) A black dinosaur is the 5th
from the front in a line, and the 5th from the end of the line. How
many dinosaurs are there in line?