Addition and Subtraction
18 + 50 = _____
68
65
1/4 of 24 = ____
6
Leandra gave Layla 2 red crayons and 3 blue crayons.
How many crayons will Leandra need to give 6 friends in total?
30 crayons
(2 red crayons + 3 blue crayons = 5 crayons)
(5 crayons x 6 friends = 30 crayons in total)
Sanvi and Presley can choose either:
1/2 of £62
1/4 of £100
Sanvi chose 1/2 of £62
Presley chose 1/4 of £100
Who chose the largest amount? Explain.
Sanvi chose the largest amount because 1/2 of £62 is £31 and 1/4 of £100 is £25
71 - 8 = ____
63
84 ÷ 4 = ____
21
1/2 of 96 = ____
48
Akash and Riley are going to the zoo at 5:30 pm. They finish school at 3:20 pm.
How long do they have to wait until they can go to the zoo?
2 hours and 10 minutes
Brandon and Miyah solve 84 ÷ 6 = 14
Miyah thinks the inverse is 84 ÷ 14 = 6
Brandon thinks the inverse is 8 x 84 = 14
Who is correct? Explain.
Neither are correct.
The inverse is 6 x 14 = 84 or 14 x 6 = 84
I know this because the inverse operation of division is multiplication. 84 is the whole and 6 and 14 are the two parts.
You must multiply the two parts to get the whole
682 + 391 = _____
1,073
178 x 5 = ___
890
8/8 of 10 = ___
10
Eoin, Chloe, and Dragos decides to sell their drawings.
They sell 2,041 drawings in September. Eoin sold 862 drawings and Chloe sold 602 drawings.
How many drawings did Dragos sell?
577
Jayden and Emily draw an array of 3 x 4
X X X X
X X X X
X X X X
They need to circle 1/3 of the array
Jayden circles 3 x's and Emily circles 4 x's
Who has circled the correct amount? Explain
Emily has circled the correct amount. I know this because 1/3 of 12 is 4.
You can calculate this by doing 12 ÷ 3 = 4.
1,701 - 233
1,468
687 ÷ 3 = ___
229
3/8 + 2/8 = ___
5/8
Alice and Frankie want to solve 825 - 261.
Alice rounds each number to the nearest hundred.
Frankie rounds each number to the nearest ten.
What answer does each child get for their estimation?
Alice: 800 - 300 = 500
Frankie: 830 - 260 = 570
Nicola and Emme make a number sequence.
48 ___ ___ 84 ___ ___ 120
Fill in the missing spaces and explain the sequence.
48, 60, 72, 84, 98, 108, 120
The sequence is going up in multiples of 12
_____ = 1,592 - 1,028
564
.5 ÷ 10 = ____
0.05
12/18 - 2/18
10/18
Adele and Harris list factors of a number:
2, 3, 4, 6, 8, 12
What could their number be?
24
(2 x 12, 3 x 8, 4 x 6)
Zaayan, Jaaziah and Teddy are doing estimates.
Zaayan thinks a pencil is 1 centimetre.
Jaaziah thinks a pencil is 10 centimetres.
Teddy thinks a pencil is 100 centimetres.
Zaayan thinks a pencil weighs 7 kilograms
Jaaziah thinks a pencil weighs 70 grams
Teddy thinks a pencil weighs 7 grams
Whose estimates do you think are the most accurate?
A pencil is approximately 10 centimetres (Jaaziah)
A pencil weighs approximately 7 grams (Teddy)