TIMES AS MANY (NC.4.OA.1)
Liam has 4 apples. Mia has 3 times as many. How many does Mia have?
what is 12
34 × 2
what is 68
24 ÷ 6
4
2 1/4 + 1 1/4
3 1/2
Ava walked 1/2 mile Monday and 1/4 mile Tuesday. Total?
3/4 mile
Student says 34 × 2 = 48
Forgot to multiply tens
9 groups of 6
54
What math tool helps explain multiplication?
Area model
Solve and justify:
4 3/4 + 2 5/4 − 1 1/2
7 1/2
A class has 6 tables. Another class has 5 times as many. How many tables?
what is 30
56 × 4
WHAT IS 224
84 ÷ 7
12
5 2/3 − 1 1/3
4 1/3
Jay drank 2 1/2 cups of water and 1 1/2 more later. Total?
4 cups
Student says 125 ÷ 4 = 25 R1
Quotient incorrect
432 ÷ 6
72
What strategy helps solve division?
Partial quotients
“4 times as many” mean?
What is Multiply by 4
127 × 3
WHAT IS 381
96 ÷ 8
12
3 3/8 + 2 4/8
6 7/8
A rope is 5 1/4 ft long. 2 3/4 ft was cut. Remaining?
2 1/2 ft
Student says 2 1/4 + 1 1/4 = 3 2/8
Needs simplification
2 2/6 + 3 1/6
5 3/6 or 5 1/2
Why use benchmark fractions?
Compare easily
an equation: 8 times as many as 7
What is 8 × 7 = 56
46 × 25
WHAT IS 1,150
125 ÷ 4
31 R1
7 1/5 − 3 4/5
3 2/5
Why should answers be simplified?
Show correct form
Student says 7 1/5 − 3 4/5 = 4 3/0
Did not regroup correctly
64 × 12
768
Explain how estimation helps multiplication
Checks reasonableness
the difference between additive and multiplicative comparison
What is Multiplication compares groups
Explain why partial products work
WHAT IS it breaks apart place values
Explain what a remainder means
Amount left over
Why do we regroup when subtracting fractions?
Fraction part too small
Explain how models help solve fraction problems
Visual understanding
Why check work with estimation?
See if answer is reasonable
Multi-step: Liam had 3 1/2 pizzas. He bought 2 more and shared 1 1/2. How much left?
4 pizzas
What makes a strong EOG explanation?
Math evidence + reasoning