Open ended
The sum of two numbers is 25. What could the numbers be? Write at least 2 different combinations.
Use the build to 10 strategy to solve: 9 + 6 = ?
10 + 5 = 15
45 + ___ = 60
Round 48 and 53 to the nearest 10, then add the rounded numbers.
50 + 50 = 100
Sarah has 25 apples, and Tom has 18 apples. How many apples do they have in total?
43
The sum of two numbers is 100. One of the numbers is even. What might the two numbers be? Write 4 examples.
Use the jump strategy on a number line to solve: 48 + 35 = ?
83
___ + 28 = 100
72
Round 125 and 89 to the nearest 10, then find their sum.
130 + 90= 220
A bakery sold 135 cupcakes in the morning and 142 in the afternoon. How many cupcakes did they sell altogether?
277
The sum of three numbers is 150. What might the two numbers be? Write 6 examples.
50 points per answer.
Show the jump strategy to solve: 52 + 37
Show working out (jump tens then ones)
Answer = 89
125 + ___ = 300
175
Round 732 and 458 to the nearest 100, then find the total.
700 + 500 = 1,200
A train travelled 245 km on Monday and 318 km on Tuesday. How far did it travel in total?
563
Create two different addition equations where the sum is 300, and at least one number is a multiple of 10
200 points per equation.
Show how you would use the split to solve: 146 + 33
Must show split strategy working out
Answer= 179
___ + 250 + 100 = 500
150
134 + 689 Is the answer going to be more or less than 1,000? Tell me what you think and why (without solving it using rounding)
LESS
134 rounds down (100)
689 rounds up (700)
700 + 100 = 800
Lily read 348 pages in her first book and 276 pages in her second book. How many pages did she read in total?
624
Write 5 number sentences where the sum is 1,000. At least one of the numbers in each equation must be a three-digit number.
Solve this: 267 + 138 + 45.
450
784 + ___ = 1,000
216
12.75 + 8.25: Round these numbers to the nearest tenth and then add their total.
A factory produced 1,235 boxes of chocolates in January and 987 boxes in February. How many boxes did it produce in total?
2,222