Calculate:
77 + 22
810 + 180
672 + 119
7017 + 2906
6347 + 332
63\,423 + 1272
55\,236 + 4004
882 + 565 + 53
Explain the mental strategies you used to add the numbers in question 1.
Calculate:
676 + 235 + 46
536 + 492 + 698
50 + 8261 + 938 + 4394
1635 + 84 + 249 + 9874
Four friends are picking fruit in an orchard. Kathleen picks 27 apples, Xavier picks 25 peaches, Ryan picks 13 pears and Elizabeth picks 15 plums.
How many pieces of fruit were picked in total?
There are 232 different species of fish and other wildlife at an aquarium. The aquarium has advertised the addition of 92 new species of fish, 8 new species of crustaceans and 9 new species of sharks.
How many species of fish and wildlife will the aquarium be home to?
Calculate:
99999 - 300
67773-3003
66747-25332
3662−43
2519−146
99447−7718
83849−24187
56253−47785
It took Gwen 137 seconds to finish a race. John finished the race 3 seconds quicker than Gwen, and Susana finished the race 4 seconds quicker than John.
How many seconds did it take Susana to finish the race?
Georgia has ordered 388 large bricks for the purpose of building a brick shed. She uses 222 bricks for the two side walls, 82 bricks for the back wall and 54 bricks for the front wall, leaving space for a door.
How many bricks will there be left over?
Calculate:
6 \times 30
60 \times 30
45 \times 93
95 \times 907
649 \times 29
We want to calculate 6 \times 608 using an area model.
Find the areas of each of the smaller rectangles, in the given area model:
Using the area model, calculate 6 \times 608.
Explain why the area model helps calculate the multiplication.
We want to calculate 50 \times 83 using an area model.
Find the areas of each of the smaller rectangles, in the given area model:
Using the area model, calculate 50 \times 83.
We want to calculate 83 \times 660 using an area model.
Find the areas of each of the smaller rectangles, in the given area model:
Using the area model, calculate \\ 83 \times 660.
We want to calculate 87 \times 974 using an area model.
Find the areas of each of the smaller rectangles, in the given area model:
Using the area model, calculate \\ 87 \times 974.
A group of countries have decided to donate \$3,508,060 every year toward improving fresh water availability. How much money will the group donate over 16 years?
Calculate:
72 \div 8
360 \div 4
6349 \div 7
2996 \div 4
36300 \div 60
1300 \div 5
270 \div 9
480 \div 12
Calculate:
39000 \div 65
2655 \div 59
31512 \div 52
22644 \div 34
On a certain island a species of hawk sustains itself by eating the local rabbits. In the first survey of animals on the island, there were found to be 5 rabbits for every hawk. The latest survey shows that this is still the case, but that the rabbit population has grown to 350. How many hawks can this feed?