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| Standard M1N3 |
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Description
M1N3:
Students will add and subtract numbers less than 100 as well
as understand and use the inverse relationship between addition and
subtraction.
a.
Identify one more than, one less than, 10 more than, and 10 less
than a given number.
b. Skip-count by 2’s, 5’s, and 10’s forward and backwards – to and
from numbers up to 100.
c. Compose/decompose numbers up to 10 --"break numbers apart",
e.g., 8 is represented as 4 + 4, 3 + 5, 5 + 2 + 1, and 10-2).
d. Understand a variety of situations to which subtraction may
apply: taking away from a set, comparing two sets, and determining
how many more or how many less.
e. Understand addition and subtraction number combinations using
strategies such as counting on, counting back, doubles, and making
tens.
f. Know the single-digit addition facts to 18 and corresponding
subtraction facts with understanding and fluency. (Use strategies
such as relating to facts already known, applying the commutative
property, and grouping facts into families.)
g. Apply addition and subtraction to 2-digit numbers without
regrouping (e.g., 15 + 4, 80-60, 56 + 10, 100-30, 52 + 5).
h. Solve and create word problems involving addition and
subtraction to 100 without regrouping. Use words, pictures, and
concrete models to interpret story problems and reflect the
combining of sets as addition and taking away or comparing elements
of sets as subtraction.
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Essential Questions
What questions can be answered using addition and/ or subtraction?
How can counting strategies be used to join, separate, or compare
sets?
What strategies help in learning addition/ subtraction facts?
How does mathematical expression differ from a number sentence?
How is a number sentence like a balance scale?
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Vocabulary
Vocabulary: tens,
ones, hundreds, less than, greater
than, place value, plus (+), sum, add, is equal to (=), addition
sentence, difference, subtraction, sentence, is equal to (=), zero
(0), minus (-), counting on, doubles, order, rule, counting back,
related facts, number line, subtract all, fact family, skip count,
pattern. even. odd,
doubles plus one, related facts, make a ten, estimate
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Online Activities
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eManipulatives- Houghton Mifflin online math game site with
free interactive base ten blocks, counters, etc.
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Brain
PopJr's Number Sense segment introduces students to even and
odd using the number line. (Must log in to see video).
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Counting to 100- Toon University's number estimation game in
which students estimate which number comes next in a series.
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Place Value- Toon University's interactive game in which
students guess the place value in the story problem.
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Comparing
Numbers- Toon University's free interactive game in which
students compare numbers (>, <, and =)
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Place value, 100, 10, and 1- Virtual manipulative that
demonstrates place values in 1s, 10s, and 100s.
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Early Math
Workbench- iKnowThat.com's Math page with virtual
manipulatives. Covers math facts such as place value, addition,
and subtraction.
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Max's Math Adventures-
Scholastic site that uses rhymes, an activity page, and a place
for students to submit their answers to practice estimation
skills.
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Math Monsters: Landmark Numbers and Number Line- United
Streaming video which introduce young students to the basic
properties and concepts of number lines, both positive and
negative. (Must be logged onto United Streaming for link to
open).
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Mathica's Math Shop: A Sure Cure
United Streaming video which introduce young students to
number patterns, more than, less than, and measurement. (Must be
logged onto United Streaming for link to open).
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Mathica's Workshop: Help Wanted- United Streaming video that
introduces the concepts of skip counting, estimating numbers,
and geometry. (Must be logged onto United Streaming for link to
open).
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Mathica's Workshop: The King Comes Calling-
United Streaming videos which introduces skip counting by tens
and plane figures. (Must be logged onto United Streaming for
link to open).
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Math Investigations Part One-
United Streaming
video in which students gain understanding of counting, adding,
subtracting, finding place values, and estimating with large
numbers.
(Must be logged onto United
Streaming for link to open).
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Mathica's Math Shop: A Rich Reward- United Streaming video
in which the Math Monsters explore
addition of equal groups and counting by 2s. (Must
be logged onto United Streaming for link to open).
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Muchmore's Marvelous Machine: The Importance of Place Value
United Streaming video in which the Math Monsters begin to count
by tens, hundreds, and thousands. (Must be logged onto United
Streaming for link to open).
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TEAMS: Number Concepts for Primary Grades-
United
Streaming videos which include six number concepts for primary
grades that introduce the properties of a number.
(Must be logged onto United Streaming for link to open).
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Mathica's Math Shop: Big Business United
Streaming video that introduces math skills such as counting by
50s and the 99 game. (Must be logged
onto United Streaming for link to open).
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Mathica's Math Shop: Merry Band-United
Streaming video that demonstrates comparison of two- and
three-digit numbers, addition of two-digit numbers, sorting, and
mental math. (Must be logged onto United Streaming for link to
open).
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BBC's Number
Square activity allows students to manipulate segments of
the 100s chart by filling in missing pieces.
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BBC's Snakes
and Ladders- Virtual game of Snakes and Ladders in which
students roll the dice and move along the game board to 100. Can
be played by one or two players.
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BBC's Little Animals Activity Center- Online addition and
subtraction games from the BBC.
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BBC's Starship Number Jumbler- Online math skills including
odd and even, more or less, and rounding to the nearest 10.
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| Harcourt School Activities
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