We are currently learning about place value (tens and ones - dizaines et unités). Students are expected to be able to identify the number when presented with images of tens and ones. They should also be able to deconstruct a number into its tens and ones (53 is 5 tens and 3 ones). Students are also expected to represent a number in a variety of ways using tens and ones (52 is 5 tens and 2 ones, 4 tens and 12 ones, 3 tens and 22 ones, 2 tens and 32 ones, 1 ten and 42 ones, or 52 ones). Finally students should be able to look at a group of objects and put them into groups of ten in order to count the total number of objects in the picture (If the picture has 53 objects, your child has drawn a circle around 10 objects 5 times and there are 3 objects that don't belong in a circle to give you 5 tens and 3 ones).
Here is a link that allows your child to practice grouping and regrouping tens and ones to represent numbers and to add.
Base blocks
(In the right hand column, at the bottom, you can adjust the number of columns to work with. Please set it to two columns to focus on tens and ones only.) When your child adds 10 ones, they can group them together to create a ten and then need to move it to the tens column. See the teacher/parent icon at the top of the page for further directions.
I find dice are a fun way to explore this concept. Roll the die once and designate it for the tens, you child then draws the corresponding number of tens, then roll it again for the ones and draw the ones, and finally write the total number that you got (a trick being that you glue the tens number to the ones number - 5 tens and 3 ones is 53 OR counting by groups of ten and then the ones 10-20-30-40-50-51-52-53). It could be a family game where you all roll and draw to see who created the largest number.
We have played an addition game in class that might be fun...though sometimes the numbers get too big, If your child thinks the numbers are too big to work with, tell them to roll again, in grade 1 we're only working on addition to 20, but the bigger numbers provide a challenge for those students who are up for it.
We have been working a lot on this concept in class, but it is one of the more difficult ones to master. One of the common mistakes students make is to write 50 tens instead of 5 tens - understanding that the dizaines (tens) are a group of ten is the most difficult aspect of this concept.
Here is a link that allows your child to practice grouping and regrouping tens and ones to represent numbers and to add.
Base blocks
(In the right hand column, at the bottom, you can adjust the number of columns to work with. Please set it to two columns to focus on tens and ones only.) When your child adds 10 ones, they can group them together to create a ten and then need to move it to the tens column. See the teacher/parent icon at the top of the page for further directions.
We have played an addition game in class that might be fun...though sometimes the numbers get too big, If your child thinks the numbers are too big to work with, tell them to roll again, in grade 1 we're only working on addition to 20, but the bigger numbers provide a challenge for those students who are up for it.
We have been working a lot on this concept in class, but it is one of the more difficult ones to master. One of the common mistakes students make is to write 50 tens instead of 5 tens - understanding that the dizaines (tens) are a group of ten is the most difficult aspect of this concept.