Do you remember how to ?
Find the missing number to equal the number 98.
89 + ⬚ = 98
20 + ⬚ = 98
28 + ⬚ = 98
For our number sentences to be equivalent, both sides need to be equal. Let's see how to check if this is true, as well as how we can make it true.
Complete the number sentence: 31 - ⬚ = 16
If we need to find a missing number, we can use things such as bridge to 10, and number lines to help us. Let's see how we can do this for an addition and a subtraction problem, to make a sentence equal.
Complete the number sentence: 48 - ⬚ = 19 + 16
uses mental and written strategies for addition and subtraction involving two-, three-, four and five-digit numbers